kern_jail.c revision 232186
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 232186 2012-02-26 16:30:39Z mm $"); 31116182Sobrien 32193066Sjamie#include "opt_compat.h" 33185435Sbz#include "opt_ddb.h" 34185435Sbz#include "opt_inet.h" 35185435Sbz#include "opt_inet6.h" 36131177Spjd 3746155Sphk#include <sys/param.h> 3846155Sphk#include <sys/types.h> 3946155Sphk#include <sys/kernel.h> 4046155Sphk#include <sys/systm.h> 4146155Sphk#include <sys/errno.h> 4246155Sphk#include <sys/sysproto.h> 4346155Sphk#include <sys/malloc.h> 44192895Sjamie#include <sys/osd.h> 45164032Srwatson#include <sys/priv.h> 4646155Sphk#include <sys/proc.h> 47124882Srwatson#include <sys/taskqueue.h> 48177785Skib#include <sys/fcntl.h> 4946155Sphk#include <sys/jail.h> 5087275Srwatson#include <sys/lock.h> 5187275Srwatson#include <sys/mutex.h> 52220137Strasz#include <sys/racct.h> 53221362Strasz#include <sys/refcount.h> 54168401Spjd#include <sys/sx.h> 55193066Sjamie#include <sys/sysent.h> 56113275Smike#include <sys/namei.h> 57147185Spjd#include <sys/mount.h> 58113275Smike#include <sys/queue.h> 5946155Sphk#include <sys/socket.h> 60113275Smike#include <sys/syscallsubr.h> 6157163Srwatson#include <sys/sysctl.h> 62113275Smike#include <sys/vnode.h> 63196019Srwatson 6446155Sphk#include <net/if.h> 65196019Srwatson#include <net/vnet.h> 66196019Srwatson 6746155Sphk#include <netinet/in.h> 68196019Srwatson 69185435Sbz#ifdef DDB 70185435Sbz#include <ddb/ddb.h> 71185435Sbz#ifdef INET6 72185435Sbz#include <netinet6/in6_var.h> 73185435Sbz#endif /* INET6 */ 74185435Sbz#endif /* DDB */ 7546155Sphk 76163606Srwatson#include <security/mac/mac_framework.h> 77163606Srwatson 78195944Sjamie#define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000" 79195944Sjamie 8046155SphkMALLOC_DEFINE(M_PRISON, "prison", "Prison structures"); 81227293Sedstatic MALLOC_DEFINE(M_PRISON_RACCT, "prison_racct", "Prison racct structures"); 8246155Sphk 83202468Sbz/* Keep struct prison prison0 and some code in kern_jail_set() readable. */ 84202468Sbz#ifdef INET 85202468Sbz#ifdef INET6 86202468Sbz#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL|PR_IP6_SADDRSEL 87202468Sbz#else 88202468Sbz#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL 89202468Sbz#endif 90202468Sbz#else /* !INET */ 91202468Sbz#ifdef INET6 92202468Sbz#define _PR_IP_SADDRSEL PR_IP6_SADDRSEL 93202468Sbz#else 94202468Sbz#define _PR_IP_SADDRSEL 0 95202468Sbz#endif 96202468Sbz#endif 97202468Sbz 98192895Sjamie/* prison0 describes what is "real" about the system. */ 99192895Sjamiestruct prison prison0 = { 100192895Sjamie .pr_id = 0, 101192895Sjamie .pr_name = "0", 102192895Sjamie .pr_ref = 1, 103192895Sjamie .pr_uref = 1, 104192895Sjamie .pr_path = "/", 105192895Sjamie .pr_securelevel = -1, 106231267Smm .pr_devfs_rsnum = 0, 107194762Sjamie .pr_childmax = JAIL_MAX, 108195944Sjamie .pr_hostuuid = DEFAULT_HOSTUUID, 109201145Santoine .pr_children = LIST_HEAD_INITIALIZER(prison0.pr_children), 110196176Sbz#ifdef VIMAGE 111202468Sbz .pr_flags = PR_HOST|PR_VNET|_PR_IP_SADDRSEL, 112196176Sbz#else 113202468Sbz .pr_flags = PR_HOST|_PR_IP_SADDRSEL, 114196176Sbz#endif 115192895Sjamie .pr_allow = PR_ALLOW_ALL, 116192895Sjamie}; 117192895SjamieMTX_SYSINIT(prison0, &prison0.pr_mtx, "jail mutex", MTX_DEF); 11857163Srwatson 119221362Strasz/* allprison, allprison_racct and lastprid are protected by allprison_lock. */ 120168401Spjdstruct sx allprison_lock; 121191673SjamieSX_SYSINIT(allprison_lock, &allprison_lock, "allprison"); 122191673Sjamiestruct prisonlist allprison = TAILQ_HEAD_INITIALIZER(allprison); 123221362StraszLIST_HEAD(, prison_racct) allprison_racct; 124179881Sdelphijint lastprid = 0; 125113275Smike 126191673Sjamiestatic int do_jail_attach(struct thread *td, struct prison *pr); 127190466Sjamiestatic void prison_complete(void *context, int pending); 128191673Sjamiestatic void prison_deref(struct prison *pr, int flags); 129192895Sjamiestatic char *prison_path(struct prison *pr1, struct prison *pr2); 130192895Sjamiestatic void prison_remove_one(struct prison *pr); 131221362Strasz#ifdef RACCT 132221362Straszstatic void prison_racct_attach(struct prison *pr); 133221362Straszstatic void prison_racct_detach(struct prison *pr); 134221362Strasz#endif 135185435Sbz#ifdef INET 136190466Sjamiestatic int _prison_check_ip4(struct prison *pr, struct in_addr *ia); 137192895Sjamiestatic int prison_restrict_ip4(struct prison *pr, struct in_addr *newip4); 138185435Sbz#endif 139185435Sbz#ifdef INET6 140190466Sjamiestatic int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6); 141192895Sjamiestatic int prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6); 142185435Sbz#endif 143113275Smike 144191673Sjamie/* Flags for prison_deref */ 145191673Sjamie#define PD_DEREF 0x01 146191673Sjamie#define PD_DEUREF 0x02 147191673Sjamie#define PD_LOCKED 0x04 148191673Sjamie#define PD_LIST_SLOCKED 0x08 149191673Sjamie#define PD_LIST_XLOCKED 0x10 150113275Smike 151192895Sjamie/* 152216861Sbz * Parameter names corresponding to PR_* flag values. Size values are for kvm 153216861Sbz * as we cannot figure out the size of a sparse array, or an array without a 154216861Sbz * terminating entry. 155192895Sjamie */ 156192895Sjamiestatic char *pr_flag_names[] = { 157192895Sjamie [0] = "persist", 158202468Sbz#ifdef INET 159202468Sbz [7] = "ip4.saddrsel", 160202468Sbz#endif 161202468Sbz#ifdef INET6 162202468Sbz [8] = "ip6.saddrsel", 163202468Sbz#endif 164192895Sjamie}; 165216861Sbzconst size_t pr_flag_names_size = sizeof(pr_flag_names); 166192895Sjamie 167192895Sjamiestatic char *pr_flag_nonames[] = { 168192895Sjamie [0] = "nopersist", 169202468Sbz#ifdef INET 170202468Sbz [7] = "ip4.nosaddrsel", 171202468Sbz#endif 172202468Sbz#ifdef INET6 173202468Sbz [8] = "ip6.nosaddrsel", 174202468Sbz#endif 175195870Sjamie}; 176216861Sbzconst size_t pr_flag_nonames_size = sizeof(pr_flag_nonames); 177195870Sjamie 178195870Sjamiestruct jailsys_flags { 179195870Sjamie const char *name; 180195870Sjamie unsigned disable; 181195870Sjamie unsigned new; 182195870Sjamie} pr_flag_jailsys[] = { 183195870Sjamie { "host", 0, PR_HOST }, 184195870Sjamie#ifdef VIMAGE 185195870Sjamie { "vnet", 0, PR_VNET }, 186195870Sjamie#endif 187192895Sjamie#ifdef INET 188195870Sjamie { "ip4", PR_IP4_USER | PR_IP4_DISABLE, PR_IP4_USER }, 189192895Sjamie#endif 190192895Sjamie#ifdef INET6 191195870Sjamie { "ip6", PR_IP6_USER | PR_IP6_DISABLE, PR_IP6_USER }, 192192895Sjamie#endif 193192895Sjamie}; 194216861Sbzconst size_t pr_flag_jailsys_size = sizeof(pr_flag_jailsys); 195192895Sjamie 196192895Sjamiestatic char *pr_allow_names[] = { 197192895Sjamie "allow.set_hostname", 198192895Sjamie "allow.sysvipc", 199192895Sjamie "allow.raw_sockets", 200192895Sjamie "allow.chflags", 201192895Sjamie "allow.mount", 202192895Sjamie "allow.quotas", 203192895Sjamie "allow.socket_af", 204232059Smm "allow.mount.devfs", 205232059Smm "allow.mount.nullfs", 206232186Smm "allow.mount.zfs", 207192895Sjamie}; 208216861Sbzconst size_t pr_allow_names_size = sizeof(pr_allow_names); 209192895Sjamie 210192895Sjamiestatic char *pr_allow_nonames[] = { 211192895Sjamie "allow.noset_hostname", 212192895Sjamie "allow.nosysvipc", 213192895Sjamie "allow.noraw_sockets", 214192895Sjamie "allow.nochflags", 215192895Sjamie "allow.nomount", 216192895Sjamie "allow.noquotas", 217192895Sjamie "allow.nosocket_af", 218232059Smm "allow.mount.nodevfs", 219232059Smm "allow.mount.nonullfs", 220232186Smm "allow.mount.nozfs", 221192895Sjamie}; 222216861Sbzconst size_t pr_allow_nonames_size = sizeof(pr_allow_nonames); 223192895Sjamie 224196002Sjamie#define JAIL_DEFAULT_ALLOW PR_ALLOW_SET_HOSTNAME 225196002Sjamie#define JAIL_DEFAULT_ENFORCE_STATFS 2 226232059Smm#define JAIL_DEFAULT_DEVFS_RSNUM 0 227192895Sjamiestatic unsigned jail_default_allow = JAIL_DEFAULT_ALLOW; 228196002Sjamiestatic int jail_default_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 229231267Smmstatic int jail_default_devfs_rsnum = JAIL_DEFAULT_DEVFS_RSNUM; 230192895Sjamie#if defined(INET) || defined(INET6) 231193865Sjamiestatic unsigned jail_max_af_ips = 255; 232192895Sjamie#endif 233192895Sjamie 234192895Sjamie#ifdef INET 235185435Sbzstatic int 236185435Sbzqcmp_v4(const void *ip1, const void *ip2) 237185435Sbz{ 238185435Sbz in_addr_t iaa, iab; 239185435Sbz 240185435Sbz /* 241185435Sbz * We need to compare in HBO here to get the list sorted as expected 242185435Sbz * by the result of the code. Sorting NBO addresses gives you 243185435Sbz * interesting results. If you do not understand, do not try. 244185435Sbz */ 245185435Sbz iaa = ntohl(((const struct in_addr *)ip1)->s_addr); 246185435Sbz iab = ntohl(((const struct in_addr *)ip2)->s_addr); 247185435Sbz 248185435Sbz /* 249185435Sbz * Do not simply return the difference of the two numbers, the int is 250185435Sbz * not wide enough. 251185435Sbz */ 252185435Sbz if (iaa > iab) 253185435Sbz return (1); 254185435Sbz else if (iaa < iab) 255185435Sbz return (-1); 256185435Sbz else 257185435Sbz return (0); 258185435Sbz} 259185435Sbz#endif 260185435Sbz 261185435Sbz#ifdef INET6 262185435Sbzstatic int 263185435Sbzqcmp_v6(const void *ip1, const void *ip2) 264185435Sbz{ 265185435Sbz const struct in6_addr *ia6a, *ia6b; 266185435Sbz int i, rc; 267185435Sbz 268185435Sbz ia6a = (const struct in6_addr *)ip1; 269185435Sbz ia6b = (const struct in6_addr *)ip2; 270185435Sbz 271185435Sbz rc = 0; 272190466Sjamie for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) { 273185435Sbz if (ia6a->s6_addr[i] > ia6b->s6_addr[i]) 274185435Sbz rc = 1; 275185435Sbz else if (ia6a->s6_addr[i] < ia6b->s6_addr[i]) 276185435Sbz rc = -1; 277185435Sbz } 278185435Sbz return (rc); 279185435Sbz} 280185435Sbz#endif 281185435Sbz 282191673Sjamie/* 283191673Sjamie * struct jail_args { 284191673Sjamie * struct jail *jail; 285191673Sjamie * }; 286191673Sjamie */ 287191673Sjamieint 288225617Skmacysys_jail(struct thread *td, struct jail_args *uap) 289185435Sbz{ 290191673Sjamie uint32_t version; 291191673Sjamie int error; 292192895Sjamie struct jail j; 293185435Sbz 294191673Sjamie error = copyin(uap->jail, &version, sizeof(uint32_t)); 295191673Sjamie if (error) 296191673Sjamie return (error); 297185435Sbz 298191673Sjamie switch (version) { 299191673Sjamie case 0: 300191673Sjamie { 301191673Sjamie struct jail_v0 j0; 302185435Sbz 303192895Sjamie /* FreeBSD single IPv4 jails. */ 304192895Sjamie bzero(&j, sizeof(struct jail)); 305191673Sjamie error = copyin(uap->jail, &j0, sizeof(struct jail_v0)); 306191673Sjamie if (error) 307191673Sjamie return (error); 308192895Sjamie j.version = j0.version; 309192895Sjamie j.path = j0.path; 310192895Sjamie j.hostname = j0.hostname; 311192895Sjamie j.ip4s = j0.ip_number; 312191673Sjamie break; 313191673Sjamie } 314191673Sjamie 315191673Sjamie case 1: 316185435Sbz /* 317191673Sjamie * Version 1 was used by multi-IPv4 jail implementations 318191673Sjamie * that never made it into the official kernel. 319185435Sbz */ 320191673Sjamie return (EINVAL); 321185435Sbz 322191673Sjamie case 2: /* JAIL_API_VERSION */ 323191673Sjamie /* FreeBSD multi-IPv4/IPv6,noIP jails. */ 324191673Sjamie error = copyin(uap->jail, &j, sizeof(struct jail)); 325191673Sjamie if (error) 326191673Sjamie return (error); 327192895Sjamie break; 328192895Sjamie 329192895Sjamie default: 330192895Sjamie /* Sci-Fi jails are not supported, sorry. */ 331192895Sjamie return (EINVAL); 332192895Sjamie } 333192895Sjamie return (kern_jail(td, &j)); 334192895Sjamie} 335192895Sjamie 336192895Sjamieint 337192895Sjamiekern_jail(struct thread *td, struct jail *j) 338192895Sjamie{ 339193865Sjamie struct iovec optiov[2 * (4 340193865Sjamie + sizeof(pr_allow_names) / sizeof(pr_allow_names[0]) 341193865Sjamie#ifdef INET 342193865Sjamie + 1 343193865Sjamie#endif 344193865Sjamie#ifdef INET6 345193865Sjamie + 1 346193865Sjamie#endif 347193865Sjamie )]; 348192895Sjamie struct uio opt; 349192895Sjamie char *u_path, *u_hostname, *u_name; 350185435Sbz#ifdef INET 351193865Sjamie uint32_t ip4s; 352192895Sjamie struct in_addr *u_ip4; 353192895Sjamie#endif 354192895Sjamie#ifdef INET6 355192895Sjamie struct in6_addr *u_ip6; 356192895Sjamie#endif 357192895Sjamie size_t tmplen; 358192895Sjamie int error, enforce_statfs, fi; 359192895Sjamie 360192895Sjamie bzero(&optiov, sizeof(optiov)); 361192895Sjamie opt.uio_iov = optiov; 362192895Sjamie opt.uio_iovcnt = 0; 363192895Sjamie opt.uio_offset = -1; 364192895Sjamie opt.uio_resid = -1; 365192895Sjamie opt.uio_segflg = UIO_SYSSPACE; 366192895Sjamie opt.uio_rw = UIO_READ; 367192895Sjamie opt.uio_td = td; 368192895Sjamie 369192895Sjamie /* Set permissions for top-level jails from sysctls. */ 370192895Sjamie if (!jailed(td->td_ucred)) { 371192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / 372192895Sjamie sizeof(pr_allow_names[0]); fi++) { 373192895Sjamie optiov[opt.uio_iovcnt].iov_base = 374192895Sjamie (jail_default_allow & (1 << fi)) 375192895Sjamie ? pr_allow_names[fi] : pr_allow_nonames[fi]; 376192895Sjamie optiov[opt.uio_iovcnt].iov_len = 377192895Sjamie strlen(optiov[opt.uio_iovcnt].iov_base) + 1; 378192895Sjamie opt.uio_iovcnt += 2; 379192895Sjamie } 380192895Sjamie optiov[opt.uio_iovcnt].iov_base = "enforce_statfs"; 381192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("enforce_statfs"); 382192895Sjamie opt.uio_iovcnt++; 383192895Sjamie enforce_statfs = jail_default_enforce_statfs; 384192895Sjamie optiov[opt.uio_iovcnt].iov_base = &enforce_statfs; 385192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof(enforce_statfs); 386192895Sjamie opt.uio_iovcnt++; 387192895Sjamie } 388192895Sjamie 389192895Sjamie tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN; 390192895Sjamie#ifdef INET 391192895Sjamie ip4s = (j->version == 0) ? 1 : j->ip4s; 392192895Sjamie if (ip4s > jail_max_af_ips) 393192895Sjamie return (EINVAL); 394192895Sjamie tmplen += ip4s * sizeof(struct in_addr); 395191673Sjamie#else 396192895Sjamie if (j->ip4s > 0) 397192895Sjamie return (EINVAL); 398191673Sjamie#endif 399191673Sjamie#ifdef INET6 400192895Sjamie if (j->ip6s > jail_max_af_ips) 401192895Sjamie return (EINVAL); 402192895Sjamie tmplen += j->ip6s * sizeof(struct in6_addr); 403191673Sjamie#else 404192895Sjamie if (j->ip6s > 0) 405192895Sjamie return (EINVAL); 406191673Sjamie#endif 407192895Sjamie u_path = malloc(tmplen, M_TEMP, M_WAITOK); 408192895Sjamie u_hostname = u_path + MAXPATHLEN; 409192895Sjamie u_name = u_hostname + MAXHOSTNAMELEN; 410191673Sjamie#ifdef INET 411192895Sjamie u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN); 412191673Sjamie#endif 413191673Sjamie#ifdef INET6 414191673Sjamie#ifdef INET 415192895Sjamie u_ip6 = (struct in6_addr *)(u_ip4 + ip4s); 416191673Sjamie#else 417192895Sjamie u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN); 418191673Sjamie#endif 419191673Sjamie#endif 420192895Sjamie optiov[opt.uio_iovcnt].iov_base = "path"; 421192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("path"); 422192895Sjamie opt.uio_iovcnt++; 423192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_path; 424192895Sjamie error = copyinstr(j->path, u_path, MAXPATHLEN, 425192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 426192895Sjamie if (error) { 427192895Sjamie free(u_path, M_TEMP); 428192895Sjamie return (error); 429192895Sjamie } 430192895Sjamie opt.uio_iovcnt++; 431192895Sjamie optiov[opt.uio_iovcnt].iov_base = "host.hostname"; 432192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("host.hostname"); 433192895Sjamie opt.uio_iovcnt++; 434192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_hostname; 435192895Sjamie error = copyinstr(j->hostname, u_hostname, MAXHOSTNAMELEN, 436192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 437192895Sjamie if (error) { 438192895Sjamie free(u_path, M_TEMP); 439192895Sjamie return (error); 440192895Sjamie } 441192895Sjamie opt.uio_iovcnt++; 442192895Sjamie if (j->jailname != NULL) { 443192895Sjamie optiov[opt.uio_iovcnt].iov_base = "name"; 444192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("name"); 445192895Sjamie opt.uio_iovcnt++; 446192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_name; 447192895Sjamie error = copyinstr(j->jailname, u_name, MAXHOSTNAMELEN, 448192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 449191673Sjamie if (error) { 450191673Sjamie free(u_path, M_TEMP); 451191673Sjamie return (error); 452191673Sjamie } 453192895Sjamie opt.uio_iovcnt++; 454192895Sjamie } 455191673Sjamie#ifdef INET 456192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; 457192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); 458192895Sjamie opt.uio_iovcnt++; 459192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip4; 460192895Sjamie optiov[opt.uio_iovcnt].iov_len = ip4s * sizeof(struct in_addr); 461192895Sjamie if (j->version == 0) 462192895Sjamie u_ip4->s_addr = j->ip4s; 463192895Sjamie else { 464192895Sjamie error = copyin(j->ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len); 465191673Sjamie if (error) { 466191673Sjamie free(u_path, M_TEMP); 467191673Sjamie return (error); 468191673Sjamie } 469192895Sjamie } 470192895Sjamie opt.uio_iovcnt++; 471185435Sbz#endif 472185435Sbz#ifdef INET6 473192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip6.addr"; 474192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr"); 475192895Sjamie opt.uio_iovcnt++; 476192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip6; 477192895Sjamie optiov[opt.uio_iovcnt].iov_len = j->ip6s * sizeof(struct in6_addr); 478192895Sjamie error = copyin(j->ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len); 479192895Sjamie if (error) { 480192895Sjamie free(u_path, M_TEMP); 481192895Sjamie return (error); 482192895Sjamie } 483192895Sjamie opt.uio_iovcnt++; 484185435Sbz#endif 485192895Sjamie KASSERT(opt.uio_iovcnt <= sizeof(optiov) / sizeof(optiov[0]), 486192895Sjamie ("kern_jail: too many iovecs (%d)", opt.uio_iovcnt)); 487191673Sjamie error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH); 488191673Sjamie free(u_path, M_TEMP); 489191673Sjamie return (error); 490185435Sbz} 491185435Sbz 492192895Sjamie 493191673Sjamie/* 494191673Sjamie * struct jail_set_args { 495191673Sjamie * struct iovec *iovp; 496191673Sjamie * unsigned int iovcnt; 497191673Sjamie * int flags; 498191673Sjamie * }; 499191673Sjamie */ 500191673Sjamieint 501225617Skmacysys_jail_set(struct thread *td, struct jail_set_args *uap) 502185435Sbz{ 503191673Sjamie struct uio *auio; 504191673Sjamie int error; 505191673Sjamie 506191673Sjamie /* Check that we have an even number of iovecs. */ 507191673Sjamie if (uap->iovcnt & 1) 508191673Sjamie return (EINVAL); 509191673Sjamie 510191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 511191673Sjamie if (error) 512191673Sjamie return (error); 513191673Sjamie error = kern_jail_set(td, auio, uap->flags); 514191673Sjamie free(auio, M_IOV); 515191673Sjamie return (error); 516191673Sjamie} 517191673Sjamie 518191673Sjamieint 519191673Sjamiekern_jail_set(struct thread *td, struct uio *optuio, int flags) 520191673Sjamie{ 521191673Sjamie struct nameidata nd; 522185435Sbz#ifdef INET 523190466Sjamie struct in_addr *ip4; 524185435Sbz#endif 525185435Sbz#ifdef INET6 526185435Sbz struct in6_addr *ip6; 527185435Sbz#endif 528191673Sjamie struct vfsopt *opt; 529191673Sjamie struct vfsoptlist *opts; 530196135Sbz struct prison *pr, *deadpr, *mypr, *ppr, *tpr; 531191673Sjamie struct vnode *root; 532196835Sjamie char *domain, *errmsg, *host, *name, *namelc, *p, *path, *uuid; 533230407Smm char *g_path; 534192895Sjamie#if defined(INET) || defined(INET6) 535196135Sbz struct prison *tppr; 536191673Sjamie void *op; 537192895Sjamie#endif 538193066Sjamie unsigned long hid; 539192895Sjamie size_t namelen, onamelen; 540192895Sjamie int created, cuflags, descend, enforce, error, errmsg_len, errmsg_pos; 541231267Smm int gotchildmax, gotenforce, gothid, gotrsnum, gotslevel; 542195870Sjamie int fi, jid, jsys, len, level; 543231267Smm int childmax, rsnum, slevel, vfslocked; 544230129Smm int fullpath_disabled; 545191673Sjamie#if defined(INET) || defined(INET6) 546192895Sjamie int ii, ij; 547191673Sjamie#endif 548191673Sjamie#ifdef INET 549195974Sjamie int ip4s, redo_ip4; 550191673Sjamie#endif 551191673Sjamie#ifdef INET6 552195974Sjamie int ip6s, redo_ip6; 553191673Sjamie#endif 554224290Smckusick uint64_t pr_allow, ch_allow, pr_flags, ch_flags; 555224290Smckusick unsigned tallow; 556191673Sjamie char numbuf[12]; 557185435Sbz 558191673Sjamie error = priv_check(td, PRIV_JAIL_SET); 559191673Sjamie if (!error && (flags & JAIL_ATTACH)) 560191673Sjamie error = priv_check(td, PRIV_JAIL_ATTACH); 561191673Sjamie if (error) 562191673Sjamie return (error); 563192895Sjamie mypr = ppr = td->td_ucred->cr_prison; 564194762Sjamie if ((flags & JAIL_CREATE) && mypr->pr_childmax == 0) 565192895Sjamie return (EPERM); 566191673Sjamie if (flags & ~JAIL_SET_MASK) 567191673Sjamie return (EINVAL); 568191673Sjamie 569185435Sbz /* 570191673Sjamie * Check all the parameters before committing to anything. Not all 571191673Sjamie * errors can be caught early, but we may as well try. Also, this 572191673Sjamie * takes care of some expensive stuff (path lookup) before getting 573191673Sjamie * the allprison lock. 574185435Sbz * 575191673Sjamie * XXX Jails are not filesystems, and jail parameters are not mount 576191673Sjamie * options. But it makes more sense to re-use the vfsopt code 577191673Sjamie * than duplicate it under a different name. 578185435Sbz */ 579191673Sjamie error = vfs_buildopts(optuio, &opts); 580191673Sjamie if (error) 581191673Sjamie return (error); 582185435Sbz#ifdef INET 583185435Sbz ip4 = NULL; 584185435Sbz#endif 585185435Sbz#ifdef INET6 586185435Sbz ip6 = NULL; 587185435Sbz#endif 588230407Smm g_path = NULL; 589191673Sjamie 590191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 591191673Sjamie if (error == ENOENT) 592191673Sjamie jid = 0; 593191673Sjamie else if (error != 0) 594191673Sjamie goto done_free; 595191673Sjamie 596191673Sjamie error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel)); 597191673Sjamie if (error == ENOENT) 598191673Sjamie gotslevel = 0; 599191673Sjamie else if (error != 0) 600191673Sjamie goto done_free; 601191673Sjamie else 602191673Sjamie gotslevel = 1; 603191673Sjamie 604194762Sjamie error = 605194762Sjamie vfs_copyopt(opts, "children.max", &childmax, sizeof(childmax)); 606194762Sjamie if (error == ENOENT) 607194762Sjamie gotchildmax = 0; 608194762Sjamie else if (error != 0) 609194762Sjamie goto done_free; 610194762Sjamie else 611194762Sjamie gotchildmax = 1; 612194762Sjamie 613192895Sjamie error = vfs_copyopt(opts, "enforce_statfs", &enforce, sizeof(enforce)); 614212436Sjamie if (error == ENOENT) 615212436Sjamie gotenforce = 0; 616212436Sjamie else if (error != 0) 617192895Sjamie goto done_free; 618212436Sjamie else if (enforce < 0 || enforce > 2) { 619212436Sjamie error = EINVAL; 620212436Sjamie goto done_free; 621212436Sjamie } else 622212436Sjamie gotenforce = 1; 623192895Sjamie 624231267Smm error = vfs_copyopt(opts, "devfs_ruleset", &rsnum, sizeof(rsnum)); 625231267Smm if (error == ENOENT) 626231267Smm gotrsnum = 0; 627231267Smm else if (error != 0) 628231267Smm goto done_free; 629231267Smm else 630231267Smm gotrsnum = 1; 631231267Smm 632191673Sjamie pr_flags = ch_flags = 0; 633192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 634192895Sjamie fi++) { 635192895Sjamie if (pr_flag_names[fi] == NULL) 636192895Sjamie continue; 637192895Sjamie vfs_flagopt(opts, pr_flag_names[fi], &pr_flags, 1 << fi); 638192895Sjamie vfs_flagopt(opts, pr_flag_nonames[fi], &ch_flags, 1 << fi); 639192895Sjamie } 640191673Sjamie ch_flags |= pr_flags; 641195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 642195870Sjamie fi++) { 643195870Sjamie error = vfs_copyopt(opts, pr_flag_jailsys[fi].name, &jsys, 644195870Sjamie sizeof(jsys)); 645195870Sjamie if (error == ENOENT) 646195870Sjamie continue; 647195870Sjamie if (error != 0) 648195870Sjamie goto done_free; 649195870Sjamie switch (jsys) { 650195870Sjamie case JAIL_SYS_DISABLE: 651195870Sjamie if (!pr_flag_jailsys[fi].disable) { 652195870Sjamie error = EINVAL; 653195870Sjamie goto done_free; 654195870Sjamie } 655195870Sjamie pr_flags |= pr_flag_jailsys[fi].disable; 656195870Sjamie break; 657195870Sjamie case JAIL_SYS_NEW: 658195870Sjamie pr_flags |= pr_flag_jailsys[fi].new; 659195870Sjamie break; 660195870Sjamie case JAIL_SYS_INHERIT: 661195870Sjamie break; 662195870Sjamie default: 663195870Sjamie error = EINVAL; 664195870Sjamie goto done_free; 665195870Sjamie } 666195870Sjamie ch_flags |= 667195870Sjamie pr_flag_jailsys[fi].new | pr_flag_jailsys[fi].disable; 668195870Sjamie } 669211085Sjamie if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE 670211085Sjamie && !(pr_flags & PR_PERSIST)) { 671211085Sjamie error = EINVAL; 672211085Sjamie vfs_opterror(opts, "new jail must persist or attach"); 673211085Sjamie goto done_errmsg; 674211085Sjamie } 675194251Sjamie#ifdef VIMAGE 676194251Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_VNET)) { 677194251Sjamie error = EINVAL; 678194251Sjamie vfs_opterror(opts, "vnet cannot be changed after creation"); 679194251Sjamie goto done_errmsg; 680194251Sjamie } 681194251Sjamie#endif 682195974Sjamie#ifdef INET 683195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP4_USER)) { 684195974Sjamie error = EINVAL; 685195974Sjamie vfs_opterror(opts, "ip4 cannot be changed after creation"); 686195974Sjamie goto done_errmsg; 687195974Sjamie } 688195974Sjamie#endif 689195974Sjamie#ifdef INET6 690195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP6_USER)) { 691195974Sjamie error = EINVAL; 692195974Sjamie vfs_opterror(opts, "ip6 cannot be changed after creation"); 693195974Sjamie goto done_errmsg; 694195974Sjamie } 695195974Sjamie#endif 696191673Sjamie 697192895Sjamie pr_allow = ch_allow = 0; 698192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 699192895Sjamie fi++) { 700192895Sjamie vfs_flagopt(opts, pr_allow_names[fi], &pr_allow, 1 << fi); 701192895Sjamie vfs_flagopt(opts, pr_allow_nonames[fi], &ch_allow, 1 << fi); 702192895Sjamie } 703192895Sjamie ch_allow |= pr_allow; 704192895Sjamie 705191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 706191673Sjamie if (error == ENOENT) 707191673Sjamie name = NULL; 708191673Sjamie else if (error != 0) 709191673Sjamie goto done_free; 710191673Sjamie else { 711191673Sjamie if (len == 0 || name[len - 1] != '\0') { 712191673Sjamie error = EINVAL; 713191673Sjamie goto done_free; 714191673Sjamie } 715191673Sjamie if (len > MAXHOSTNAMELEN) { 716191673Sjamie error = ENAMETOOLONG; 717191673Sjamie goto done_free; 718191673Sjamie } 719191673Sjamie } 720191673Sjamie 721191673Sjamie error = vfs_getopt(opts, "host.hostname", (void **)&host, &len); 722191673Sjamie if (error == ENOENT) 723191673Sjamie host = NULL; 724191673Sjamie else if (error != 0) 725191673Sjamie goto done_free; 726191673Sjamie else { 727193066Sjamie ch_flags |= PR_HOST; 728193066Sjamie pr_flags |= PR_HOST; 729191673Sjamie if (len == 0 || host[len - 1] != '\0') { 730191673Sjamie error = EINVAL; 731191673Sjamie goto done_free; 732191673Sjamie } 733191673Sjamie if (len > MAXHOSTNAMELEN) { 734191673Sjamie error = ENAMETOOLONG; 735191673Sjamie goto done_free; 736191673Sjamie } 737191673Sjamie } 738191673Sjamie 739193066Sjamie error = vfs_getopt(opts, "host.domainname", (void **)&domain, &len); 740193066Sjamie if (error == ENOENT) 741193066Sjamie domain = NULL; 742193066Sjamie else if (error != 0) 743193066Sjamie goto done_free; 744193066Sjamie else { 745193066Sjamie ch_flags |= PR_HOST; 746193066Sjamie pr_flags |= PR_HOST; 747193066Sjamie if (len == 0 || domain[len - 1] != '\0') { 748193066Sjamie error = EINVAL; 749193066Sjamie goto done_free; 750193066Sjamie } 751193066Sjamie if (len > MAXHOSTNAMELEN) { 752193066Sjamie error = ENAMETOOLONG; 753193066Sjamie goto done_free; 754193066Sjamie } 755193066Sjamie } 756193066Sjamie 757193066Sjamie error = vfs_getopt(opts, "host.hostuuid", (void **)&uuid, &len); 758193066Sjamie if (error == ENOENT) 759193066Sjamie uuid = NULL; 760193066Sjamie else if (error != 0) 761193066Sjamie goto done_free; 762193066Sjamie else { 763193066Sjamie ch_flags |= PR_HOST; 764193066Sjamie pr_flags |= PR_HOST; 765193066Sjamie if (len == 0 || uuid[len - 1] != '\0') { 766193066Sjamie error = EINVAL; 767193066Sjamie goto done_free; 768193066Sjamie } 769193066Sjamie if (len > HOSTUUIDLEN) { 770193066Sjamie error = ENAMETOOLONG; 771193066Sjamie goto done_free; 772193066Sjamie } 773193066Sjamie } 774193066Sjamie 775205014Snwhitehorn#ifdef COMPAT_FREEBSD32 776217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 777193066Sjamie uint32_t hid32; 778193066Sjamie 779193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid32, sizeof(hid32)); 780193066Sjamie hid = hid32; 781193066Sjamie } else 782193066Sjamie#endif 783193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid, sizeof(hid)); 784193066Sjamie if (error == ENOENT) 785193066Sjamie gothid = 0; 786193066Sjamie else if (error != 0) 787193066Sjamie goto done_free; 788193066Sjamie else { 789193066Sjamie gothid = 1; 790193066Sjamie ch_flags |= PR_HOST; 791193066Sjamie pr_flags |= PR_HOST; 792193066Sjamie } 793193066Sjamie 794185435Sbz#ifdef INET 795191673Sjamie error = vfs_getopt(opts, "ip4.addr", &op, &ip4s); 796191673Sjamie if (error == ENOENT) 797195870Sjamie ip4s = (pr_flags & PR_IP4_DISABLE) ? 0 : -1; 798191673Sjamie else if (error != 0) 799191673Sjamie goto done_free; 800191673Sjamie else if (ip4s & (sizeof(*ip4) - 1)) { 801191673Sjamie error = EINVAL; 802191673Sjamie goto done_free; 803192895Sjamie } else { 804195870Sjamie ch_flags |= PR_IP4_USER | PR_IP4_DISABLE; 805195870Sjamie if (ip4s == 0) 806195870Sjamie pr_flags |= PR_IP4_USER | PR_IP4_DISABLE; 807195870Sjamie else { 808195870Sjamie pr_flags = (pr_flags & ~PR_IP4_DISABLE) | PR_IP4_USER; 809192895Sjamie ip4s /= sizeof(*ip4); 810192895Sjamie if (ip4s > jail_max_af_ips) { 811185435Sbz error = EINVAL; 812192895Sjamie vfs_opterror(opts, "too many IPv4 addresses"); 813192895Sjamie goto done_errmsg; 814185435Sbz } 815195974Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 816192895Sjamie bcopy(op, ip4, ip4s * sizeof(*ip4)); 817192895Sjamie /* 818192895Sjamie * IP addresses are all sorted but ip[0] to preserve 819192895Sjamie * the primary IP address as given from userland. 820192895Sjamie * This special IP is used for unbound outgoing 821202116Sbz * connections as well for "loopback" traffic in case 822202116Sbz * source address selection cannot find any more fitting 823202116Sbz * address to connect from. 824192895Sjamie */ 825192895Sjamie if (ip4s > 1) 826192895Sjamie qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4); 827192895Sjamie /* 828192895Sjamie * Check for duplicate addresses and do some simple 829192895Sjamie * zero and broadcast checks. If users give other bogus 830192895Sjamie * addresses it is their problem. 831192895Sjamie * 832192895Sjamie * We do not have to care about byte order for these 833192895Sjamie * checks so we will do them in NBO. 834192895Sjamie */ 835192895Sjamie for (ii = 0; ii < ip4s; ii++) { 836192895Sjamie if (ip4[ii].s_addr == INADDR_ANY || 837192895Sjamie ip4[ii].s_addr == INADDR_BROADCAST) { 838192895Sjamie error = EINVAL; 839192895Sjamie goto done_free; 840192895Sjamie } 841192895Sjamie if ((ii+1) < ip4s && 842192895Sjamie (ip4[0].s_addr == ip4[ii+1].s_addr || 843192895Sjamie ip4[ii].s_addr == ip4[ii+1].s_addr)) { 844192895Sjamie error = EINVAL; 845192895Sjamie goto done_free; 846192895Sjamie } 847192895Sjamie } 848185435Sbz } 849191673Sjamie } 850191673Sjamie#endif 851185435Sbz 852185435Sbz#ifdef INET6 853191673Sjamie error = vfs_getopt(opts, "ip6.addr", &op, &ip6s); 854191673Sjamie if (error == ENOENT) 855195870Sjamie ip6s = (pr_flags & PR_IP6_DISABLE) ? 0 : -1; 856191673Sjamie else if (error != 0) 857191673Sjamie goto done_free; 858191673Sjamie else if (ip6s & (sizeof(*ip6) - 1)) { 859191673Sjamie error = EINVAL; 860191673Sjamie goto done_free; 861192895Sjamie } else { 862195870Sjamie ch_flags |= PR_IP6_USER | PR_IP6_DISABLE; 863195870Sjamie if (ip6s == 0) 864195870Sjamie pr_flags |= PR_IP6_USER | PR_IP6_DISABLE; 865195870Sjamie else { 866195870Sjamie pr_flags = (pr_flags & ~PR_IP6_DISABLE) | PR_IP6_USER; 867192895Sjamie ip6s /= sizeof(*ip6); 868192895Sjamie if (ip6s > jail_max_af_ips) { 869185435Sbz error = EINVAL; 870192895Sjamie vfs_opterror(opts, "too many IPv6 addresses"); 871192895Sjamie goto done_errmsg; 872185435Sbz } 873195974Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 874192895Sjamie bcopy(op, ip6, ip6s * sizeof(*ip6)); 875192895Sjamie if (ip6s > 1) 876192895Sjamie qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6); 877192895Sjamie for (ii = 0; ii < ip6s; ii++) { 878192895Sjamie if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) { 879192895Sjamie error = EINVAL; 880192895Sjamie goto done_free; 881192895Sjamie } 882192895Sjamie if ((ii+1) < ip6s && 883192895Sjamie (IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) || 884192895Sjamie IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1]))) 885192895Sjamie { 886192895Sjamie error = EINVAL; 887192895Sjamie goto done_free; 888192895Sjamie } 889192895Sjamie } 890185435Sbz } 891191673Sjamie } 892185435Sbz#endif 893185435Sbz 894195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 895195945Sjamie if ((ch_flags & PR_VNET) && (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 896195945Sjamie error = EINVAL; 897195945Sjamie vfs_opterror(opts, 898195945Sjamie "vnet jails cannot have IP address restrictions"); 899195945Sjamie goto done_errmsg; 900195945Sjamie } 901195945Sjamie#endif 902195945Sjamie 903230143Smm fullpath_disabled = 0; 904191673Sjamie root = NULL; 905191673Sjamie error = vfs_getopt(opts, "path", (void **)&path, &len); 906191673Sjamie if (error == ENOENT) 907191673Sjamie path = NULL; 908191673Sjamie else if (error != 0) 909191673Sjamie goto done_free; 910191673Sjamie else { 911191673Sjamie if (flags & JAIL_UPDATE) { 912191673Sjamie error = EINVAL; 913191673Sjamie vfs_opterror(opts, 914191673Sjamie "path cannot be changed after creation"); 915191673Sjamie goto done_errmsg; 916191673Sjamie } 917191673Sjamie if (len == 0 || path[len - 1] != '\0') { 918191673Sjamie error = EINVAL; 919191673Sjamie goto done_free; 920191673Sjamie } 921230129Smm NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE, UIO_SYSSPACE, 922230129Smm path, td); 923230129Smm error = namei(&nd); 924230129Smm if (error) 925230129Smm goto done_free; 926230129Smm vfslocked = NDHASGIANT(&nd); 927230129Smm root = nd.ni_vp; 928230129Smm NDFREE(&nd, NDF_ONLY_PNBUF); 929230407Smm g_path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 930230407Smm strlcpy(g_path, path, MAXPATHLEN); 931230407Smm error = vn_path_to_global_path(td, root, g_path, MAXPATHLEN); 932230407Smm if (error == 0) 933230407Smm path = g_path; 934230407Smm else if (error == ENODEV) { 935230129Smm /* proceed if sysctl debug.disablefullpath == 1 */ 936230129Smm fullpath_disabled = 1; 937230129Smm if (len < 2 || (len == 2 && path[0] == '/')) 938230129Smm path = NULL; 939230407Smm } else { 940230129Smm /* exit on other errors */ 941230129Smm VFS_UNLOCK_GIANT(vfslocked); 942230129Smm goto done_free; 943230129Smm } 944230129Smm if (root->v_type != VDIR) { 945230129Smm error = ENOTDIR; 946230129Smm vput(root); 947230129Smm VFS_UNLOCK_GIANT(vfslocked); 948230129Smm goto done_free; 949230129Smm } 950230129Smm VOP_UNLOCK(root, 0); 951230129Smm VFS_UNLOCK_GIANT(vfslocked); 952230129Smm if (fullpath_disabled) { 953192895Sjamie /* Leave room for a real-root full pathname. */ 954192895Sjamie if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/") 955192895Sjamie ? strlen(mypr->pr_path) : 0) > MAXPATHLEN) { 956192895Sjamie error = ENAMETOOLONG; 957192895Sjamie goto done_free; 958192895Sjamie } 959191673Sjamie } 960191673Sjamie } 961185435Sbz 962191673Sjamie /* 963191673Sjamie * Grab the allprison lock before letting modules check their 964191673Sjamie * parameters. Once we have it, do not let go so we'll have a 965191673Sjamie * consistent view of the OSD list. 966191673Sjamie */ 967191673Sjamie sx_xlock(&allprison_lock); 968191673Sjamie error = osd_jail_call(NULL, PR_METHOD_CHECK, opts); 969191673Sjamie if (error) 970191673Sjamie goto done_unlock_list; 971185435Sbz 972191673Sjamie /* By now, all parameters should have been noted. */ 973191673Sjamie TAILQ_FOREACH(opt, opts, link) { 974191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 975191673Sjamie error = EINVAL; 976191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 977191673Sjamie goto done_unlock_list; 978191673Sjamie } 979191673Sjamie } 980191673Sjamie 981185435Sbz /* 982191673Sjamie * See if we are creating a new record or updating an existing one. 983191673Sjamie * This abuses the file error codes ENOENT and EEXIST. 984185435Sbz */ 985191673Sjamie cuflags = flags & (JAIL_CREATE | JAIL_UPDATE); 986191673Sjamie if (!cuflags) { 987191673Sjamie error = EINVAL; 988191673Sjamie vfs_opterror(opts, "no valid operation (create or update)"); 989191673Sjamie goto done_unlock_list; 990191673Sjamie } 991191673Sjamie pr = NULL; 992196835Sjamie namelc = NULL; 993196835Sjamie if (cuflags == JAIL_CREATE && jid == 0 && name != NULL) { 994196835Sjamie namelc = strrchr(name, '.'); 995196835Sjamie jid = strtoul(namelc != NULL ? namelc + 1 : name, &p, 10); 996196835Sjamie if (*p != '\0') 997196835Sjamie jid = 0; 998196835Sjamie } 999191673Sjamie if (jid != 0) { 1000192895Sjamie /* 1001192895Sjamie * See if a requested jid already exists. There is an 1002192895Sjamie * information leak here if the jid exists but is not within 1003192895Sjamie * the caller's jail hierarchy. Jail creators will get EEXIST 1004192895Sjamie * even though they cannot see the jail, and CREATE | UPDATE 1005192895Sjamie * will return ENOENT which is not normally a valid error. 1006192895Sjamie */ 1007191673Sjamie if (jid < 0) { 1008191673Sjamie error = EINVAL; 1009191673Sjamie vfs_opterror(opts, "negative jid"); 1010191673Sjamie goto done_unlock_list; 1011191673Sjamie } 1012191673Sjamie pr = prison_find(jid); 1013191673Sjamie if (pr != NULL) { 1014192895Sjamie ppr = pr->pr_parent; 1015191673Sjamie /* Create: jid must not exist. */ 1016191673Sjamie if (cuflags == JAIL_CREATE) { 1017191673Sjamie mtx_unlock(&pr->pr_mtx); 1018191673Sjamie error = EEXIST; 1019191673Sjamie vfs_opterror(opts, "jail %d already exists", 1020191673Sjamie jid); 1021191673Sjamie goto done_unlock_list; 1022191673Sjamie } 1023192895Sjamie if (!prison_ischild(mypr, pr)) { 1024192895Sjamie mtx_unlock(&pr->pr_mtx); 1025192895Sjamie pr = NULL; 1026192895Sjamie } else if (pr->pr_uref == 0) { 1027191673Sjamie if (!(flags & JAIL_DYING)) { 1028191673Sjamie mtx_unlock(&pr->pr_mtx); 1029191673Sjamie error = ENOENT; 1030191673Sjamie vfs_opterror(opts, "jail %d is dying", 1031191673Sjamie jid); 1032191673Sjamie goto done_unlock_list; 1033191673Sjamie } else if ((flags & JAIL_ATTACH) || 1034191673Sjamie (pr_flags & PR_PERSIST)) { 1035191673Sjamie /* 1036191673Sjamie * A dying jail might be resurrected 1037191673Sjamie * (via attach or persist), but first 1038191673Sjamie * it must determine if another jail 1039191673Sjamie * has claimed its name. Accomplish 1040191673Sjamie * this by implicitly re-setting the 1041191673Sjamie * name. 1042191673Sjamie */ 1043191673Sjamie if (name == NULL) 1044192895Sjamie name = prison_name(mypr, pr); 1045191673Sjamie } 1046191673Sjamie } 1047191673Sjamie } 1048191673Sjamie if (pr == NULL) { 1049191673Sjamie /* Update: jid must exist. */ 1050191673Sjamie if (cuflags == JAIL_UPDATE) { 1051191673Sjamie error = ENOENT; 1052191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1053191673Sjamie goto done_unlock_list; 1054191673Sjamie } 1055191673Sjamie } 1056191673Sjamie } 1057191673Sjamie /* 1058191673Sjamie * If the caller provided a name, look for a jail by that name. 1059191673Sjamie * This has different semantics for creates and updates keyed by jid 1060191673Sjamie * (where the name must not already exist in a different jail), 1061191673Sjamie * and updates keyed by the name itself (where the name must exist 1062191673Sjamie * because that is the jail being updated). 1063191673Sjamie */ 1064191673Sjamie if (name != NULL) { 1065196835Sjamie namelc = strrchr(name, '.'); 1066196835Sjamie if (namelc == NULL) 1067196835Sjamie namelc = name; 1068196835Sjamie else { 1069192895Sjamie /* 1070192895Sjamie * This is a hierarchical name. Split it into the 1071192895Sjamie * parent and child names, and make sure the parent 1072192895Sjamie * exists or matches an already found jail. 1073192895Sjamie */ 1074196835Sjamie *namelc = '\0'; 1075192895Sjamie if (pr != NULL) { 1076196835Sjamie if (strncmp(name, ppr->pr_name, namelc - name) 1077196835Sjamie || ppr->pr_name[namelc - name] != '\0') { 1078192895Sjamie mtx_unlock(&pr->pr_mtx); 1079192895Sjamie error = EINVAL; 1080192895Sjamie vfs_opterror(opts, 1081192895Sjamie "cannot change jail's parent"); 1082192895Sjamie goto done_unlock_list; 1083192895Sjamie } 1084192895Sjamie } else { 1085192895Sjamie ppr = prison_find_name(mypr, name); 1086192895Sjamie if (ppr == NULL) { 1087192895Sjamie error = ENOENT; 1088192895Sjamie vfs_opterror(opts, 1089192895Sjamie "jail \"%s\" not found", name); 1090192895Sjamie goto done_unlock_list; 1091192895Sjamie } 1092192895Sjamie mtx_unlock(&ppr->pr_mtx); 1093192895Sjamie } 1094196835Sjamie name = ++namelc; 1095192895Sjamie } 1096191673Sjamie if (name[0] != '\0') { 1097192895Sjamie namelen = 1098192895Sjamie (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1099192895Sjamie name_again: 1100191673Sjamie deadpr = NULL; 1101192895Sjamie FOREACH_PRISON_CHILD(ppr, tpr) { 1102191673Sjamie if (tpr != pr && tpr->pr_ref > 0 && 1103192895Sjamie !strcmp(tpr->pr_name + namelen, name)) { 1104191673Sjamie if (pr == NULL && 1105191673Sjamie cuflags != JAIL_CREATE) { 1106191673Sjamie mtx_lock(&tpr->pr_mtx); 1107191673Sjamie if (tpr->pr_ref > 0) { 1108191673Sjamie /* 1109191673Sjamie * Use this jail 1110191673Sjamie * for updates. 1111191673Sjamie */ 1112191673Sjamie if (tpr->pr_uref > 0) { 1113191673Sjamie pr = tpr; 1114191673Sjamie break; 1115191673Sjamie } 1116191673Sjamie deadpr = tpr; 1117191673Sjamie } 1118191673Sjamie mtx_unlock(&tpr->pr_mtx); 1119191673Sjamie } else if (tpr->pr_uref > 0) { 1120191673Sjamie /* 1121191673Sjamie * Create, or update(jid): 1122191673Sjamie * name must not exist in an 1123192895Sjamie * active sibling jail. 1124191673Sjamie */ 1125191673Sjamie error = EEXIST; 1126191673Sjamie if (pr != NULL) 1127191673Sjamie mtx_unlock(&pr->pr_mtx); 1128191673Sjamie vfs_opterror(opts, 1129191673Sjamie "jail \"%s\" already exists", 1130191673Sjamie name); 1131191673Sjamie goto done_unlock_list; 1132191673Sjamie } 1133191673Sjamie } 1134191673Sjamie } 1135191673Sjamie /* If no active jail is found, use a dying one. */ 1136191673Sjamie if (deadpr != NULL && pr == NULL) { 1137191673Sjamie if (flags & JAIL_DYING) { 1138191673Sjamie mtx_lock(&deadpr->pr_mtx); 1139191673Sjamie if (deadpr->pr_ref == 0) { 1140191673Sjamie mtx_unlock(&deadpr->pr_mtx); 1141191673Sjamie goto name_again; 1142191673Sjamie } 1143191673Sjamie pr = deadpr; 1144191673Sjamie } else if (cuflags == JAIL_UPDATE) { 1145191673Sjamie error = ENOENT; 1146191673Sjamie vfs_opterror(opts, 1147191673Sjamie "jail \"%s\" is dying", name); 1148191673Sjamie goto done_unlock_list; 1149191673Sjamie } 1150191673Sjamie } 1151191673Sjamie /* Update: name must exist if no jid. */ 1152191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1153191673Sjamie error = ENOENT; 1154191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1155191673Sjamie name); 1156191673Sjamie goto done_unlock_list; 1157191673Sjamie } 1158191673Sjamie } 1159191673Sjamie } 1160191673Sjamie /* Update: must provide a jid or name. */ 1161191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1162191673Sjamie error = ENOENT; 1163191673Sjamie vfs_opterror(opts, "update specified no jail"); 1164191673Sjamie goto done_unlock_list; 1165191673Sjamie } 1166185435Sbz 1167191673Sjamie /* If there's no prison to update, create a new one and link it in. */ 1168191673Sjamie if (pr == NULL) { 1169194762Sjamie for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent) 1170194762Sjamie if (tpr->pr_childcount >= tpr->pr_childmax) { 1171194762Sjamie error = EPERM; 1172194762Sjamie vfs_opterror(opts, "prison limit exceeded"); 1173194762Sjamie goto done_unlock_list; 1174194762Sjamie } 1175191673Sjamie created = 1; 1176192895Sjamie mtx_lock(&ppr->pr_mtx); 1177192895Sjamie if (ppr->pr_ref == 0 || (ppr->pr_flags & PR_REMOVE)) { 1178192895Sjamie mtx_unlock(&ppr->pr_mtx); 1179192895Sjamie error = ENOENT; 1180192895Sjamie vfs_opterror(opts, "parent jail went away!"); 1181192895Sjamie goto done_unlock_list; 1182192895Sjamie } 1183192895Sjamie ppr->pr_ref++; 1184192895Sjamie ppr->pr_uref++; 1185192895Sjamie mtx_unlock(&ppr->pr_mtx); 1186191673Sjamie pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); 1187191673Sjamie if (jid == 0) { 1188191673Sjamie /* Find the next free jid. */ 1189191673Sjamie jid = lastprid + 1; 1190191673Sjamie findnext: 1191191673Sjamie if (jid == JAIL_MAX) 1192191673Sjamie jid = 1; 1193191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) { 1194191673Sjamie if (tpr->pr_id < jid) 1195191673Sjamie continue; 1196191673Sjamie if (tpr->pr_id > jid || tpr->pr_ref == 0) { 1197191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1198191673Sjamie break; 1199191673Sjamie } 1200191673Sjamie if (jid == lastprid) { 1201191673Sjamie error = EAGAIN; 1202191673Sjamie vfs_opterror(opts, 1203191673Sjamie "no available jail IDs"); 1204191673Sjamie free(pr, M_PRISON); 1205192895Sjamie prison_deref(ppr, PD_DEREF | 1206192895Sjamie PD_DEUREF | PD_LIST_XLOCKED); 1207192895Sjamie goto done_releroot; 1208191673Sjamie } 1209191673Sjamie jid++; 1210191673Sjamie goto findnext; 1211191673Sjamie } 1212191673Sjamie lastprid = jid; 1213191673Sjamie } else { 1214191673Sjamie /* 1215191673Sjamie * The jail already has a jid (that did not yet exist), 1216191673Sjamie * so just find where to insert it. 1217191673Sjamie */ 1218191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) 1219191673Sjamie if (tpr->pr_id >= jid) { 1220191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1221191673Sjamie break; 1222191673Sjamie } 1223191673Sjamie } 1224191673Sjamie if (tpr == NULL) 1225191673Sjamie TAILQ_INSERT_TAIL(&allprison, pr, pr_list); 1226192895Sjamie LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling); 1227192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 1228194762Sjamie tpr->pr_childcount++; 1229185435Sbz 1230192895Sjamie pr->pr_parent = ppr; 1231191673Sjamie pr->pr_id = jid; 1232192895Sjamie 1233192895Sjamie /* Set some default values, and inherit some from the parent. */ 1234191673Sjamie if (name == NULL) 1235191673Sjamie name = ""; 1236191673Sjamie if (path == NULL) { 1237191673Sjamie path = "/"; 1238192895Sjamie root = mypr->pr_root; 1239191673Sjamie vref(root); 1240191673Sjamie } 1241195944Sjamie strlcpy(pr->pr_hostuuid, DEFAULT_HOSTUUID, HOSTUUIDLEN); 1242195944Sjamie pr->pr_flags |= PR_HOST; 1243195945Sjamie#if defined(INET) || defined(INET6) 1244195945Sjamie#ifdef VIMAGE 1245195945Sjamie if (!(pr_flags & PR_VNET)) 1246195945Sjamie#endif 1247195945Sjamie { 1248192895Sjamie#ifdef INET 1249195974Sjamie if (!(ch_flags & PR_IP4_USER)) 1250195974Sjamie pr->pr_flags |= 1251195974Sjamie PR_IP4 | PR_IP4_USER | PR_IP4_DISABLE; 1252195974Sjamie else if (!(pr_flags & PR_IP4_USER)) { 1253195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP4; 1254195974Sjamie if (ppr->pr_ip4 != NULL) { 1255195974Sjamie pr->pr_ip4s = ppr->pr_ip4s; 1256195974Sjamie pr->pr_ip4 = malloc(pr->pr_ip4s * 1257195974Sjamie sizeof(struct in_addr), M_PRISON, 1258195974Sjamie M_WAITOK); 1259195974Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 1260195974Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1261195974Sjamie } 1262195974Sjamie } 1263192895Sjamie#endif 1264192895Sjamie#ifdef INET6 1265195974Sjamie if (!(ch_flags & PR_IP6_USER)) 1266195974Sjamie pr->pr_flags |= 1267195974Sjamie PR_IP6 | PR_IP6_USER | PR_IP6_DISABLE; 1268195974Sjamie else if (!(pr_flags & PR_IP6_USER)) { 1269195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP6; 1270195974Sjamie if (ppr->pr_ip6 != NULL) { 1271195974Sjamie pr->pr_ip6s = ppr->pr_ip6s; 1272195974Sjamie pr->pr_ip6 = malloc(pr->pr_ip6s * 1273195974Sjamie sizeof(struct in6_addr), M_PRISON, 1274195974Sjamie M_WAITOK); 1275195974Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 1276195974Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1277195974Sjamie } 1278195974Sjamie } 1279192895Sjamie#endif 1280195945Sjamie } 1281195945Sjamie#endif 1282202468Sbz /* Source address selection is always on by default. */ 1283202468Sbz pr->pr_flags |= _PR_IP_SADDRSEL; 1284202468Sbz 1285192895Sjamie pr->pr_securelevel = ppr->pr_securelevel; 1286192895Sjamie pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow; 1287196002Sjamie pr->pr_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 1288232059Smm pr->pr_devfs_rsnum = ppr->pr_devfs_rsnum; 1289191673Sjamie 1290192895Sjamie LIST_INIT(&pr->pr_children); 1291192895Sjamie mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK); 1292191673Sjamie 1293194251Sjamie#ifdef VIMAGE 1294194251Sjamie /* Allocate a new vnet if specified. */ 1295194251Sjamie pr->pr_vnet = (pr_flags & PR_VNET) 1296194251Sjamie ? vnet_alloc() : ppr->pr_vnet; 1297194251Sjamie#endif 1298185435Sbz /* 1299191673Sjamie * Allocate a dedicated cpuset for each jail. 1300191673Sjamie * Unlike other initial settings, this may return an erorr. 1301185435Sbz */ 1302192895Sjamie error = cpuset_create_root(ppr, &pr->pr_cpuset); 1303191673Sjamie if (error) { 1304191673Sjamie prison_deref(pr, PD_LIST_XLOCKED); 1305191673Sjamie goto done_releroot; 1306191673Sjamie } 1307185435Sbz 1308191673Sjamie mtx_lock(&pr->pr_mtx); 1309185435Sbz /* 1310191673Sjamie * New prisons do not yet have a reference, because we do not 1311191673Sjamie * want other to see the incomplete prison once the 1312191673Sjamie * allprison_lock is downgraded. 1313185435Sbz */ 1314191673Sjamie } else { 1315191673Sjamie created = 0; 1316195974Sjamie /* 1317195974Sjamie * Grab a reference for existing prisons, to ensure they 1318195974Sjamie * continue to exist for the duration of the call. 1319195974Sjamie */ 1320195974Sjamie pr->pr_ref++; 1321195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 1322195945Sjamie if ((pr->pr_flags & PR_VNET) && 1323195945Sjamie (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 1324195945Sjamie error = EINVAL; 1325195945Sjamie vfs_opterror(opts, 1326195945Sjamie "vnet jails cannot have IP address restrictions"); 1327195945Sjamie goto done_deref_locked; 1328195945Sjamie } 1329195945Sjamie#endif 1330195974Sjamie#ifdef INET 1331195974Sjamie if (PR_IP4_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1332195974Sjamie error = EINVAL; 1333195974Sjamie vfs_opterror(opts, 1334195974Sjamie "ip4 cannot be changed after creation"); 1335195974Sjamie goto done_deref_locked; 1336195974Sjamie } 1337195974Sjamie#endif 1338195974Sjamie#ifdef INET6 1339195974Sjamie if (PR_IP6_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1340195974Sjamie error = EINVAL; 1341195974Sjamie vfs_opterror(opts, 1342195974Sjamie "ip6 cannot be changed after creation"); 1343195974Sjamie goto done_deref_locked; 1344195974Sjamie } 1345195974Sjamie#endif 1346191673Sjamie } 1347185435Sbz 1348191673Sjamie /* Do final error checking before setting anything. */ 1349192895Sjamie if (gotslevel) { 1350192895Sjamie if (slevel < ppr->pr_securelevel) { 1351192895Sjamie error = EPERM; 1352192895Sjamie goto done_deref_locked; 1353192895Sjamie } 1354192895Sjamie } 1355194762Sjamie if (gotchildmax) { 1356194762Sjamie if (childmax >= ppr->pr_childmax) { 1357194762Sjamie error = EPERM; 1358194762Sjamie goto done_deref_locked; 1359194762Sjamie } 1360194762Sjamie } 1361192895Sjamie if (gotenforce) { 1362192895Sjamie if (enforce < ppr->pr_enforce_statfs) { 1363192895Sjamie error = EPERM; 1364192895Sjamie goto done_deref_locked; 1365192895Sjamie } 1366192895Sjamie } 1367231267Smm if (gotrsnum) { 1368231267Smm /* 1369231267Smm * devfs_rsnum is a uint16_t 1370231267Smm */ 1371232059Smm if (rsnum < 0 || rsnum > 65535) { 1372231267Smm error = EINVAL; 1373231267Smm goto done_deref_locked; 1374231267Smm } 1375231267Smm /* 1376232059Smm * Nested jails always inherit parent's devfs ruleset 1377231267Smm */ 1378231267Smm if (jailed(td->td_ucred)) { 1379231267Smm if (rsnum > 0 && rsnum != ppr->pr_devfs_rsnum) { 1380231267Smm error = EPERM; 1381231267Smm goto done_deref_locked; 1382232059Smm } else 1383231267Smm rsnum = ppr->pr_devfs_rsnum; 1384231267Smm } 1385231267Smm } 1386185435Sbz#ifdef INET 1387195974Sjamie if (ip4s > 0) { 1388192895Sjamie if (ppr->pr_flags & PR_IP4) { 1389195974Sjamie /* 1390195974Sjamie * Make sure the new set of IP addresses is a 1391195974Sjamie * subset of the parent's list. Don't worry 1392195974Sjamie * about the parent being unlocked, as any 1393195974Sjamie * setting is done with allprison_lock held. 1394195974Sjamie */ 1395195974Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 1396195974Sjamie if (ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 1397195974Sjamie break; 1398195974Sjamie if (ij == ppr->pr_ip4s) { 1399195974Sjamie error = EPERM; 1400195974Sjamie goto done_deref_locked; 1401195974Sjamie } 1402195974Sjamie if (ip4s > 1) { 1403195974Sjamie for (ii = ij = 1; ii < ip4s; ii++) { 1404195974Sjamie if (ip4[ii].s_addr == 1405195974Sjamie ppr->pr_ip4[0].s_addr) 1406195974Sjamie continue; 1407195974Sjamie for (; ij < ppr->pr_ip4s; ij++) 1408195974Sjamie if (ip4[ii].s_addr == 1409195974Sjamie ppr->pr_ip4[ij].s_addr) 1410195974Sjamie break; 1411195974Sjamie if (ij == ppr->pr_ip4s) 1412195974Sjamie break; 1413192895Sjamie } 1414192895Sjamie if (ij == ppr->pr_ip4s) { 1415192895Sjamie error = EPERM; 1416192895Sjamie goto done_deref_locked; 1417192895Sjamie } 1418192895Sjamie } 1419192895Sjamie } 1420195974Sjamie /* 1421195974Sjamie * Check for conflicting IP addresses. We permit them 1422195974Sjamie * if there is no more than one IP on each jail. If 1423195974Sjamie * there is a duplicate on a jail with more than one 1424195974Sjamie * IP stop checking and return error. 1425195974Sjamie */ 1426195974Sjamie tppr = ppr; 1427195945Sjamie#ifdef VIMAGE 1428195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1429195974Sjamie if (tppr->pr_flags & PR_VNET) 1430195974Sjamie break; 1431195945Sjamie#endif 1432195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1433195974Sjamie if (tpr == pr || 1434195945Sjamie#ifdef VIMAGE 1435195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1436195945Sjamie#endif 1437195974Sjamie tpr->pr_uref == 0) { 1438192895Sjamie descend = 0; 1439195974Sjamie continue; 1440195974Sjamie } 1441195974Sjamie if (!(tpr->pr_flags & PR_IP4_USER)) 1442195974Sjamie continue; 1443195974Sjamie descend = 0; 1444195974Sjamie if (tpr->pr_ip4 == NULL || 1445195974Sjamie (ip4s == 1 && tpr->pr_ip4s == 1)) 1446195974Sjamie continue; 1447195974Sjamie for (ii = 0; ii < ip4s; ii++) { 1448195974Sjamie if (_prison_check_ip4(tpr, &ip4[ii]) == 0) { 1449195974Sjamie error = EADDRINUSE; 1450195974Sjamie vfs_opterror(opts, 1451195974Sjamie "IPv4 addresses clash"); 1452195974Sjamie goto done_deref_locked; 1453192895Sjamie } 1454192895Sjamie } 1455192895Sjamie } 1456192895Sjamie } 1457185435Sbz#endif 1458191673Sjamie#ifdef INET6 1459195974Sjamie if (ip6s > 0) { 1460192895Sjamie if (ppr->pr_flags & PR_IP6) { 1461195974Sjamie /* 1462195974Sjamie * Make sure the new set of IP addresses is a 1463195974Sjamie * subset of the parent's list. 1464195974Sjamie */ 1465195974Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 1466195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[0], 1467195974Sjamie &ppr->pr_ip6[ij])) 1468195974Sjamie break; 1469195974Sjamie if (ij == ppr->pr_ip6s) { 1470195974Sjamie error = EPERM; 1471195974Sjamie goto done_deref_locked; 1472195974Sjamie } 1473195974Sjamie if (ip6s > 1) { 1474195974Sjamie for (ii = ij = 1; ii < ip6s; ii++) { 1475195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[ii], 1476195974Sjamie &ppr->pr_ip6[0])) 1477195974Sjamie continue; 1478195974Sjamie for (; ij < ppr->pr_ip6s; ij++) 1479195974Sjamie if (IN6_ARE_ADDR_EQUAL( 1480195974Sjamie &ip6[ii], &ppr->pr_ip6[ij])) 1481195974Sjamie break; 1482195974Sjamie if (ij == ppr->pr_ip6s) 1483195974Sjamie break; 1484192895Sjamie } 1485192895Sjamie if (ij == ppr->pr_ip6s) { 1486192895Sjamie error = EPERM; 1487192895Sjamie goto done_deref_locked; 1488192895Sjamie } 1489192895Sjamie } 1490192895Sjamie } 1491195974Sjamie /* Check for conflicting IP addresses. */ 1492195974Sjamie tppr = ppr; 1493195945Sjamie#ifdef VIMAGE 1494195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1495195974Sjamie if (tppr->pr_flags & PR_VNET) 1496195974Sjamie break; 1497195945Sjamie#endif 1498195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1499195974Sjamie if (tpr == pr || 1500195945Sjamie#ifdef VIMAGE 1501195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1502195945Sjamie#endif 1503195974Sjamie tpr->pr_uref == 0) { 1504192895Sjamie descend = 0; 1505195974Sjamie continue; 1506195974Sjamie } 1507195974Sjamie if (!(tpr->pr_flags & PR_IP6_USER)) 1508195974Sjamie continue; 1509195974Sjamie descend = 0; 1510195974Sjamie if (tpr->pr_ip6 == NULL || 1511195974Sjamie (ip6s == 1 && tpr->pr_ip6s == 1)) 1512195974Sjamie continue; 1513195974Sjamie for (ii = 0; ii < ip6s; ii++) { 1514195974Sjamie if (_prison_check_ip6(tpr, &ip6[ii]) == 0) { 1515195974Sjamie error = EADDRINUSE; 1516195974Sjamie vfs_opterror(opts, 1517195974Sjamie "IPv6 addresses clash"); 1518195974Sjamie goto done_deref_locked; 1519192895Sjamie } 1520192895Sjamie } 1521191673Sjamie } 1522192895Sjamie } 1523191673Sjamie#endif 1524192895Sjamie onamelen = namelen = 0; 1525192895Sjamie if (name != NULL) { 1526191673Sjamie /* Give a default name of the jid. */ 1527191673Sjamie if (name[0] == '\0') 1528191673Sjamie snprintf(name = numbuf, sizeof(numbuf), "%d", jid); 1529196835Sjamie else if (*namelc == '0' || (strtoul(namelc, &p, 10) != jid && 1530196835Sjamie *p == '\0')) { 1531191673Sjamie error = EINVAL; 1532196835Sjamie vfs_opterror(opts, 1533196835Sjamie "name cannot be numeric (unless it is the jid)"); 1534192895Sjamie goto done_deref_locked; 1535191673Sjamie } 1536191673Sjamie /* 1537192895Sjamie * Make sure the name isn't too long for the prison or its 1538192895Sjamie * children. 1539191673Sjamie */ 1540192895Sjamie onamelen = strlen(pr->pr_name); 1541192895Sjamie namelen = strlen(name); 1542192895Sjamie if (strlen(ppr->pr_name) + namelen + 2 > sizeof(pr->pr_name)) { 1543192895Sjamie error = ENAMETOOLONG; 1544192895Sjamie goto done_deref_locked; 1545192895Sjamie } 1546192895Sjamie FOREACH_PRISON_DESCENDANT(pr, tpr, descend) { 1547192895Sjamie if (strlen(tpr->pr_name) + (namelen - onamelen) >= 1548192895Sjamie sizeof(pr->pr_name)) { 1549192895Sjamie error = ENAMETOOLONG; 1550192895Sjamie goto done_deref_locked; 1551192895Sjamie } 1552192895Sjamie } 1553191673Sjamie } 1554192895Sjamie if (pr_allow & ~ppr->pr_allow) { 1555192895Sjamie error = EPERM; 1556192895Sjamie goto done_deref_locked; 1557192895Sjamie } 1558185435Sbz 1559191673Sjamie /* Set the parameters of the prison. */ 1560191673Sjamie#ifdef INET 1561192895Sjamie redo_ip4 = 0; 1562195974Sjamie if (pr_flags & PR_IP4_USER) { 1563195974Sjamie pr->pr_flags |= PR_IP4; 1564195974Sjamie free(pr->pr_ip4, M_PRISON); 1565195974Sjamie pr->pr_ip4s = ip4s; 1566195974Sjamie pr->pr_ip4 = ip4; 1567195974Sjamie ip4 = NULL; 1568192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1569195945Sjamie#ifdef VIMAGE 1570195945Sjamie if (tpr->pr_flags & PR_VNET) { 1571195945Sjamie descend = 0; 1572195945Sjamie continue; 1573195945Sjamie } 1574195945Sjamie#endif 1575192895Sjamie if (prison_restrict_ip4(tpr, NULL)) { 1576192895Sjamie redo_ip4 = 1; 1577192895Sjamie descend = 0; 1578192895Sjamie } 1579192895Sjamie } 1580185435Sbz } 1581191673Sjamie#endif 1582191673Sjamie#ifdef INET6 1583192895Sjamie redo_ip6 = 0; 1584195974Sjamie if (pr_flags & PR_IP6_USER) { 1585195974Sjamie pr->pr_flags |= PR_IP6; 1586195974Sjamie free(pr->pr_ip6, M_PRISON); 1587195974Sjamie pr->pr_ip6s = ip6s; 1588195974Sjamie pr->pr_ip6 = ip6; 1589195974Sjamie ip6 = NULL; 1590192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1591195945Sjamie#ifdef VIMAGE 1592195945Sjamie if (tpr->pr_flags & PR_VNET) { 1593195945Sjamie descend = 0; 1594195945Sjamie continue; 1595195945Sjamie } 1596195945Sjamie#endif 1597192895Sjamie if (prison_restrict_ip6(tpr, NULL)) { 1598192895Sjamie redo_ip6 = 1; 1599192895Sjamie descend = 0; 1600192895Sjamie } 1601192895Sjamie } 1602191673Sjamie } 1603191673Sjamie#endif 1604192895Sjamie if (gotslevel) { 1605191673Sjamie pr->pr_securelevel = slevel; 1606192895Sjamie /* Set all child jails to be at least this level. */ 1607192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1608192895Sjamie if (tpr->pr_securelevel < slevel) 1609192895Sjamie tpr->pr_securelevel = slevel; 1610192895Sjamie } 1611194762Sjamie if (gotchildmax) { 1612194762Sjamie pr->pr_childmax = childmax; 1613194762Sjamie /* Set all child jails to under this limit. */ 1614194762Sjamie FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level) 1615194762Sjamie if (tpr->pr_childmax > childmax - level) 1616194762Sjamie tpr->pr_childmax = childmax > level 1617194762Sjamie ? childmax - level : 0; 1618194762Sjamie } 1619192895Sjamie if (gotenforce) { 1620192895Sjamie pr->pr_enforce_statfs = enforce; 1621192895Sjamie /* Pass this restriction on to the children. */ 1622192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1623192895Sjamie if (tpr->pr_enforce_statfs < enforce) 1624192895Sjamie tpr->pr_enforce_statfs = enforce; 1625192895Sjamie } 1626231267Smm if (gotrsnum) { 1627231267Smm pr->pr_devfs_rsnum = rsnum; 1628231267Smm /* Pass this restriction on to the children. */ 1629231267Smm FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1630232059Smm tpr->pr_devfs_rsnum = rsnum; 1631231267Smm } 1632192895Sjamie if (name != NULL) { 1633192895Sjamie if (ppr == &prison0) 1634192895Sjamie strlcpy(pr->pr_name, name, sizeof(pr->pr_name)); 1635192895Sjamie else 1636192895Sjamie snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s", 1637192895Sjamie ppr->pr_name, name); 1638192895Sjamie /* Change this component of child names. */ 1639192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1640192895Sjamie bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen, 1641192895Sjamie strlen(tpr->pr_name + onamelen) + 1); 1642192895Sjamie bcopy(pr->pr_name, tpr->pr_name, namelen); 1643192895Sjamie } 1644192895Sjamie } 1645191673Sjamie if (path != NULL) { 1646192895Sjamie /* Try to keep a real-rooted full pathname. */ 1647230129Smm if (fullpath_disabled && path[0] == '/' && 1648230129Smm strcmp(mypr->pr_path, "/")) 1649192895Sjamie snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s", 1650192895Sjamie mypr->pr_path, path); 1651192895Sjamie else 1652192895Sjamie strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); 1653191673Sjamie pr->pr_root = root; 1654191673Sjamie } 1655193066Sjamie if (PR_HOST & ch_flags & ~pr_flags) { 1656193066Sjamie if (pr->pr_flags & PR_HOST) { 1657193066Sjamie /* 1658193066Sjamie * Copy the parent's host info. As with pr_ip4 above, 1659193066Sjamie * the lack of a lock on the parent is not a problem; 1660193066Sjamie * it is always set with allprison_lock at least 1661193066Sjamie * shared, and is held exclusively here. 1662193066Sjamie */ 1663194118Sjamie strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname, 1664194118Sjamie sizeof(pr->pr_hostname)); 1665194118Sjamie strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname, 1666194118Sjamie sizeof(pr->pr_domainname)); 1667194118Sjamie strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid, 1668194118Sjamie sizeof(pr->pr_hostuuid)); 1669193066Sjamie pr->pr_hostid = pr->pr_parent->pr_hostid; 1670193066Sjamie } 1671193066Sjamie } else if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1672193066Sjamie /* Set this prison, and any descendants without PR_HOST. */ 1673193066Sjamie if (host != NULL) 1674194118Sjamie strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname)); 1675193066Sjamie if (domain != NULL) 1676194118Sjamie strlcpy(pr->pr_domainname, domain, 1677194118Sjamie sizeof(pr->pr_domainname)); 1678193066Sjamie if (uuid != NULL) 1679194118Sjamie strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid)); 1680193066Sjamie if (gothid) 1681193066Sjamie pr->pr_hostid = hid; 1682193066Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1683193066Sjamie if (tpr->pr_flags & PR_HOST) 1684193066Sjamie descend = 0; 1685193066Sjamie else { 1686193066Sjamie if (host != NULL) 1687194118Sjamie strlcpy(tpr->pr_hostname, 1688194118Sjamie pr->pr_hostname, 1689194118Sjamie sizeof(tpr->pr_hostname)); 1690193066Sjamie if (domain != NULL) 1691194118Sjamie strlcpy(tpr->pr_domainname, 1692194118Sjamie pr->pr_domainname, 1693194118Sjamie sizeof(tpr->pr_domainname)); 1694193066Sjamie if (uuid != NULL) 1695194118Sjamie strlcpy(tpr->pr_hostuuid, 1696194118Sjamie pr->pr_hostuuid, 1697194118Sjamie sizeof(tpr->pr_hostuuid)); 1698193066Sjamie if (gothid) 1699193066Sjamie tpr->pr_hostid = hid; 1700193066Sjamie } 1701193066Sjamie } 1702193066Sjamie } 1703192895Sjamie if ((tallow = ch_allow & ~pr_allow)) { 1704192895Sjamie /* Clear allow bits in all children. */ 1705192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1706192895Sjamie tpr->pr_allow &= ~tallow; 1707192895Sjamie } 1708192895Sjamie pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow; 1709191673Sjamie /* 1710191673Sjamie * Persistent prisons get an extra reference, and prisons losing their 1711191673Sjamie * persist flag lose that reference. Only do this for existing prisons 1712191673Sjamie * for now, so new ones will remain unseen until after the module 1713191673Sjamie * handlers have completed. 1714191673Sjamie */ 1715191673Sjamie if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { 1716191673Sjamie if (pr_flags & PR_PERSIST) { 1717191673Sjamie pr->pr_ref++; 1718191673Sjamie pr->pr_uref++; 1719191673Sjamie } else { 1720191673Sjamie pr->pr_ref--; 1721191673Sjamie pr->pr_uref--; 1722191673Sjamie } 1723191673Sjamie } 1724191673Sjamie pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; 1725191673Sjamie mtx_unlock(&pr->pr_mtx); 1726185435Sbz 1727221362Strasz#ifdef RACCT 1728221362Strasz if (created) 1729221362Strasz prison_racct_attach(pr); 1730221362Strasz#endif 1731221362Strasz 1732192895Sjamie /* Locks may have prevented a complete restriction of child IP 1733192895Sjamie * addresses. If so, allocate some more memory and try again. 1734192895Sjamie */ 1735192895Sjamie#ifdef INET 1736192895Sjamie while (redo_ip4) { 1737192895Sjamie ip4s = pr->pr_ip4s; 1738192895Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 1739192895Sjamie mtx_lock(&pr->pr_mtx); 1740192895Sjamie redo_ip4 = 0; 1741192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1742195945Sjamie#ifdef VIMAGE 1743195945Sjamie if (tpr->pr_flags & PR_VNET) { 1744195945Sjamie descend = 0; 1745195945Sjamie continue; 1746195945Sjamie } 1747195945Sjamie#endif 1748192895Sjamie if (prison_restrict_ip4(tpr, ip4)) { 1749192895Sjamie if (ip4 != NULL) 1750192895Sjamie ip4 = NULL; 1751192895Sjamie else 1752192895Sjamie redo_ip4 = 1; 1753192895Sjamie } 1754192895Sjamie } 1755192895Sjamie mtx_unlock(&pr->pr_mtx); 1756192895Sjamie } 1757192895Sjamie#endif 1758192895Sjamie#ifdef INET6 1759192895Sjamie while (redo_ip6) { 1760192895Sjamie ip6s = pr->pr_ip6s; 1761192895Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 1762192895Sjamie mtx_lock(&pr->pr_mtx); 1763192895Sjamie redo_ip6 = 0; 1764192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1765195945Sjamie#ifdef VIMAGE 1766195945Sjamie if (tpr->pr_flags & PR_VNET) { 1767195945Sjamie descend = 0; 1768195945Sjamie continue; 1769195945Sjamie } 1770195945Sjamie#endif 1771192895Sjamie if (prison_restrict_ip6(tpr, ip6)) { 1772192895Sjamie if (ip6 != NULL) 1773192895Sjamie ip6 = NULL; 1774192895Sjamie else 1775192895Sjamie redo_ip6 = 1; 1776192895Sjamie } 1777192895Sjamie } 1778192895Sjamie mtx_unlock(&pr->pr_mtx); 1779192895Sjamie } 1780192895Sjamie#endif 1781192895Sjamie 1782191673Sjamie /* Let the modules do their work. */ 1783191673Sjamie sx_downgrade(&allprison_lock); 1784191673Sjamie if (created) { 1785191673Sjamie error = osd_jail_call(pr, PR_METHOD_CREATE, opts); 1786191673Sjamie if (error) { 1787191673Sjamie prison_deref(pr, PD_LIST_SLOCKED); 1788191673Sjamie goto done_errmsg; 1789191673Sjamie } 1790191673Sjamie } 1791191673Sjamie error = osd_jail_call(pr, PR_METHOD_SET, opts); 1792191673Sjamie if (error) { 1793191673Sjamie prison_deref(pr, created 1794191673Sjamie ? PD_LIST_SLOCKED 1795191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1796191673Sjamie goto done_errmsg; 1797191673Sjamie } 1798191673Sjamie 1799191673Sjamie /* Attach this process to the prison if requested. */ 1800191673Sjamie if (flags & JAIL_ATTACH) { 1801191673Sjamie mtx_lock(&pr->pr_mtx); 1802191673Sjamie error = do_jail_attach(td, pr); 1803191673Sjamie if (error) { 1804191673Sjamie vfs_opterror(opts, "attach failed"); 1805191673Sjamie if (!created) 1806191673Sjamie prison_deref(pr, PD_DEREF); 1807191673Sjamie goto done_errmsg; 1808191673Sjamie } 1809191673Sjamie } 1810191673Sjamie 1811191673Sjamie /* 1812191673Sjamie * Now that it is all there, drop the temporary reference from existing 1813191673Sjamie * prisons. Or add a reference to newly created persistent prisons 1814191673Sjamie * (which was not done earlier so that the prison would not be publicly 1815191673Sjamie * visible). 1816191673Sjamie */ 1817191673Sjamie if (!created) { 1818191673Sjamie prison_deref(pr, (flags & JAIL_ATTACH) 1819191673Sjamie ? PD_DEREF 1820191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1821191673Sjamie } else { 1822191673Sjamie if (pr_flags & PR_PERSIST) { 1823191673Sjamie mtx_lock(&pr->pr_mtx); 1824191673Sjamie pr->pr_ref++; 1825191673Sjamie pr->pr_uref++; 1826191673Sjamie mtx_unlock(&pr->pr_mtx); 1827191673Sjamie } 1828191673Sjamie if (!(flags & JAIL_ATTACH)) 1829191673Sjamie sx_sunlock(&allprison_lock); 1830191673Sjamie } 1831191673Sjamie td->td_retval[0] = pr->pr_id; 1832191673Sjamie goto done_errmsg; 1833191673Sjamie 1834192895Sjamie done_deref_locked: 1835192895Sjamie prison_deref(pr, created 1836192895Sjamie ? PD_LOCKED | PD_LIST_XLOCKED 1837192895Sjamie : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 1838192895Sjamie goto done_releroot; 1839191673Sjamie done_unlock_list: 1840191673Sjamie sx_xunlock(&allprison_lock); 1841191673Sjamie done_releroot: 1842191673Sjamie if (root != NULL) { 1843191673Sjamie vfslocked = VFS_LOCK_GIANT(root->v_mount); 1844191673Sjamie vrele(root); 1845191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 1846191673Sjamie } 1847191673Sjamie done_errmsg: 1848191673Sjamie if (error) { 1849191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 1850191673Sjamie if (errmsg_len > 0) { 1851191673Sjamie errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; 1852191673Sjamie if (errmsg_pos > 0) { 1853191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 1854191673Sjamie bcopy(errmsg, 1855191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1856191673Sjamie errmsg_len); 1857191673Sjamie else 1858191673Sjamie copyout(errmsg, 1859191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1860191673Sjamie errmsg_len); 1861191673Sjamie } 1862191673Sjamie } 1863191673Sjamie } 1864191673Sjamie done_free: 1865191673Sjamie#ifdef INET 1866191673Sjamie free(ip4, M_PRISON); 1867191673Sjamie#endif 1868191673Sjamie#ifdef INET6 1869191673Sjamie free(ip6, M_PRISON); 1870191673Sjamie#endif 1871230407Smm if (g_path != NULL) 1872230407Smm free(g_path, M_TEMP); 1873191673Sjamie vfs_freeopts(opts); 1874191673Sjamie return (error); 1875191673Sjamie} 1876191673Sjamie 1877191673Sjamie 187882710Sdillon/* 1879191673Sjamie * struct jail_get_args { 1880191673Sjamie * struct iovec *iovp; 1881191673Sjamie * unsigned int iovcnt; 1882191673Sjamie * int flags; 1883114168Smike * }; 188482710Sdillon */ 188546155Sphkint 1886225617Skmacysys_jail_get(struct thread *td, struct jail_get_args *uap) 188746155Sphk{ 1888191673Sjamie struct uio *auio; 1889185435Sbz int error; 1890185435Sbz 1891191673Sjamie /* Check that we have an even number of iovecs. */ 1892191673Sjamie if (uap->iovcnt & 1) 1893191673Sjamie return (EINVAL); 1894191673Sjamie 1895191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 1896185435Sbz if (error) 1897185435Sbz return (error); 1898191673Sjamie error = kern_jail_get(td, auio, uap->flags); 1899191673Sjamie if (error == 0) 1900191673Sjamie error = copyout(auio->uio_iov, uap->iovp, 1901191673Sjamie uap->iovcnt * sizeof (struct iovec)); 1902191673Sjamie free(auio, M_IOV); 1903191673Sjamie return (error); 1904191673Sjamie} 1905185435Sbz 1906191673Sjamieint 1907191673Sjamiekern_jail_get(struct thread *td, struct uio *optuio, int flags) 1908191673Sjamie{ 1909192895Sjamie struct prison *pr, *mypr; 1910191673Sjamie struct vfsopt *opt; 1911191673Sjamie struct vfsoptlist *opts; 1912191673Sjamie char *errmsg, *name; 1913192895Sjamie int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos; 1914185435Sbz 1915191673Sjamie if (flags & ~JAIL_GET_MASK) 1916191673Sjamie return (EINVAL); 1917185435Sbz 1918191673Sjamie /* Get the parameter list. */ 1919191673Sjamie error = vfs_buildopts(optuio, &opts); 1920191673Sjamie if (error) 1921191673Sjamie return (error); 1922191673Sjamie errmsg_pos = vfs_getopt_pos(opts, "errmsg"); 1923192895Sjamie mypr = td->td_ucred->cr_prison; 1924185435Sbz 1925191673Sjamie /* 1926191673Sjamie * Find the prison specified by one of: lastjid, jid, name. 1927191673Sjamie */ 1928191673Sjamie sx_slock(&allprison_lock); 1929191673Sjamie error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); 1930191673Sjamie if (error == 0) { 1931191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 1932192895Sjamie if (pr->pr_id > jid && prison_ischild(mypr, pr)) { 1933191673Sjamie mtx_lock(&pr->pr_mtx); 1934191673Sjamie if (pr->pr_ref > 0 && 1935191673Sjamie (pr->pr_uref > 0 || (flags & JAIL_DYING))) 1936191673Sjamie break; 1937191673Sjamie mtx_unlock(&pr->pr_mtx); 1938191673Sjamie } 1939191673Sjamie } 1940191673Sjamie if (pr != NULL) 1941191673Sjamie goto found_prison; 1942191673Sjamie error = ENOENT; 1943191673Sjamie vfs_opterror(opts, "no jail after %d", jid); 1944191673Sjamie goto done_unlock_list; 1945191673Sjamie } else if (error != ENOENT) 1946191673Sjamie goto done_unlock_list; 1947185435Sbz 1948191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 1949191673Sjamie if (error == 0) { 1950191673Sjamie if (jid != 0) { 1951192895Sjamie pr = prison_find_child(mypr, jid); 1952191673Sjamie if (pr != NULL) { 1953191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1954191673Sjamie mtx_unlock(&pr->pr_mtx); 1955191673Sjamie error = ENOENT; 1956191673Sjamie vfs_opterror(opts, "jail %d is dying", 1957191673Sjamie jid); 1958191673Sjamie goto done_unlock_list; 1959191673Sjamie } 1960191673Sjamie goto found_prison; 1961191673Sjamie } 1962191673Sjamie error = ENOENT; 1963191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1964191673Sjamie goto done_unlock_list; 1965191673Sjamie } 1966191673Sjamie } else if (error != ENOENT) 1967191673Sjamie goto done_unlock_list; 196846155Sphk 1969191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 1970191673Sjamie if (error == 0) { 1971191673Sjamie if (len == 0 || name[len - 1] != '\0') { 1972191673Sjamie error = EINVAL; 1973191673Sjamie goto done_unlock_list; 1974191673Sjamie } 1975192895Sjamie pr = prison_find_name(mypr, name); 1976191673Sjamie if (pr != NULL) { 1977191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1978191673Sjamie mtx_unlock(&pr->pr_mtx); 1979191673Sjamie error = ENOENT; 1980191673Sjamie vfs_opterror(opts, "jail \"%s\" is dying", 1981191673Sjamie name); 1982191673Sjamie goto done_unlock_list; 1983191673Sjamie } 1984191673Sjamie goto found_prison; 1985191673Sjamie } 1986191673Sjamie error = ENOENT; 1987191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", name); 1988191673Sjamie goto done_unlock_list; 1989191673Sjamie } else if (error != ENOENT) 1990191673Sjamie goto done_unlock_list; 1991185435Sbz 1992191673Sjamie vfs_opterror(opts, "no jail specified"); 1993191673Sjamie error = ENOENT; 1994191673Sjamie goto done_unlock_list; 1995191673Sjamie 1996191673Sjamie found_prison: 1997191673Sjamie /* Get the parameters of the prison. */ 1998191673Sjamie pr->pr_ref++; 1999191673Sjamie locked = PD_LOCKED; 2000191673Sjamie td->td_retval[0] = pr->pr_id; 2001191673Sjamie error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); 2002191673Sjamie if (error != 0 && error != ENOENT) 2003191673Sjamie goto done_deref; 2004192895Sjamie i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id; 2005192895Sjamie error = vfs_setopt(opts, "parent", &i, sizeof(i)); 2006191673Sjamie if (error != 0 && error != ENOENT) 2007191673Sjamie goto done_deref; 2008192895Sjamie error = vfs_setopts(opts, "name", prison_name(mypr, pr)); 2009192895Sjamie if (error != 0 && error != ENOENT) 2010192895Sjamie goto done_deref; 2011192895Sjamie error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id, 2012191673Sjamie sizeof(pr->pr_cpuset->cs_id)); 2013191673Sjamie if (error != 0 && error != ENOENT) 2014191673Sjamie goto done_deref; 2015192895Sjamie error = vfs_setopts(opts, "path", prison_path(mypr, pr)); 2016191673Sjamie if (error != 0 && error != ENOENT) 2017191673Sjamie goto done_deref; 2018191673Sjamie#ifdef INET 2019191673Sjamie error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, 2020191673Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2021191673Sjamie if (error != 0 && error != ENOENT) 2022191673Sjamie goto done_deref; 2023191673Sjamie#endif 2024191673Sjamie#ifdef INET6 2025191673Sjamie error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, 2026191673Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 2027191673Sjamie if (error != 0 && error != ENOENT) 2028191673Sjamie goto done_deref; 2029191673Sjamie#endif 2030191673Sjamie error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, 2031191673Sjamie sizeof(pr->pr_securelevel)); 2032191673Sjamie if (error != 0 && error != ENOENT) 2033191673Sjamie goto done_deref; 2034194762Sjamie error = vfs_setopt(opts, "children.cur", &pr->pr_childcount, 2035194762Sjamie sizeof(pr->pr_childcount)); 2036194762Sjamie if (error != 0 && error != ENOENT) 2037194762Sjamie goto done_deref; 2038194762Sjamie error = vfs_setopt(opts, "children.max", &pr->pr_childmax, 2039194762Sjamie sizeof(pr->pr_childmax)); 2040194762Sjamie if (error != 0 && error != ENOENT) 2041194762Sjamie goto done_deref; 2042194118Sjamie error = vfs_setopts(opts, "host.hostname", pr->pr_hostname); 2043191673Sjamie if (error != 0 && error != ENOENT) 2044191673Sjamie goto done_deref; 2045194118Sjamie error = vfs_setopts(opts, "host.domainname", pr->pr_domainname); 2046193066Sjamie if (error != 0 && error != ENOENT) 2047193066Sjamie goto done_deref; 2048194118Sjamie error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid); 2049193066Sjamie if (error != 0 && error != ENOENT) 2050193066Sjamie goto done_deref; 2051205014Snwhitehorn#ifdef COMPAT_FREEBSD32 2052217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 2053193066Sjamie uint32_t hid32 = pr->pr_hostid; 2054193066Sjamie 2055193066Sjamie error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32)); 2056193066Sjamie } else 2057193066Sjamie#endif 2058193066Sjamie error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid, 2059193066Sjamie sizeof(pr->pr_hostid)); 2060193066Sjamie if (error != 0 && error != ENOENT) 2061193066Sjamie goto done_deref; 2062192895Sjamie error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs, 2063192895Sjamie sizeof(pr->pr_enforce_statfs)); 2064191673Sjamie if (error != 0 && error != ENOENT) 2065191673Sjamie goto done_deref; 2066231267Smm error = vfs_setopt(opts, "devfs_ruleset", &pr->pr_devfs_rsnum, 2067231267Smm sizeof(pr->pr_devfs_rsnum)); 2068231267Smm if (error != 0 && error != ENOENT) 2069231267Smm goto done_deref; 2070192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 2071192895Sjamie fi++) { 2072192895Sjamie if (pr_flag_names[fi] == NULL) 2073192895Sjamie continue; 2074192895Sjamie i = (pr->pr_flags & (1 << fi)) ? 1 : 0; 2075192895Sjamie error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i)); 2076192895Sjamie if (error != 0 && error != ENOENT) 2077192895Sjamie goto done_deref; 2078192895Sjamie i = !i; 2079192895Sjamie error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i)); 2080192895Sjamie if (error != 0 && error != ENOENT) 2081192895Sjamie goto done_deref; 2082192895Sjamie } 2083195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 2084195870Sjamie fi++) { 2085195870Sjamie i = pr->pr_flags & 2086195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 2087195870Sjamie i = pr_flag_jailsys[fi].disable && 2088195870Sjamie (i == pr_flag_jailsys[fi].disable) ? JAIL_SYS_DISABLE 2089195870Sjamie : (i == pr_flag_jailsys[fi].new) ? JAIL_SYS_NEW 2090195870Sjamie : JAIL_SYS_INHERIT; 2091195870Sjamie error = 2092195870Sjamie vfs_setopt(opts, pr_flag_jailsys[fi].name, &i, sizeof(i)); 2093195870Sjamie if (error != 0 && error != ENOENT) 2094195870Sjamie goto done_deref; 2095195870Sjamie } 2096192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 2097192895Sjamie fi++) { 2098192895Sjamie if (pr_allow_names[fi] == NULL) 2099192895Sjamie continue; 2100192895Sjamie i = (pr->pr_allow & (1 << fi)) ? 1 : 0; 2101192895Sjamie error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i)); 2102192895Sjamie if (error != 0 && error != ENOENT) 2103192895Sjamie goto done_deref; 2104192895Sjamie i = !i; 2105192895Sjamie error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i)); 2106192895Sjamie if (error != 0 && error != ENOENT) 2107192895Sjamie goto done_deref; 2108192895Sjamie } 2109191673Sjamie i = (pr->pr_uref == 0); 2110191673Sjamie error = vfs_setopt(opts, "dying", &i, sizeof(i)); 2111191673Sjamie if (error != 0 && error != ENOENT) 2112191673Sjamie goto done_deref; 2113191673Sjamie i = !i; 2114191673Sjamie error = vfs_setopt(opts, "nodying", &i, sizeof(i)); 2115191673Sjamie if (error != 0 && error != ENOENT) 2116191673Sjamie goto done_deref; 2117191673Sjamie 2118191673Sjamie /* Get the module parameters. */ 2119191673Sjamie mtx_unlock(&pr->pr_mtx); 2120191673Sjamie locked = 0; 2121191673Sjamie error = osd_jail_call(pr, PR_METHOD_GET, opts); 212246155Sphk if (error) 2123191673Sjamie goto done_deref; 2124191673Sjamie prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); 212584828Sjhb 2126191673Sjamie /* By now, all parameters should have been noted. */ 2127191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2128191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 2129191673Sjamie error = EINVAL; 2130191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 2131191673Sjamie goto done_errmsg; 2132191673Sjamie } 2133185435Sbz } 2134191673Sjamie 2135191673Sjamie /* Write the fetched parameters back to userspace. */ 2136191673Sjamie error = 0; 2137191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2138191673Sjamie if (opt->pos >= 0 && opt->pos != errmsg_pos) { 2139191673Sjamie pos = 2 * opt->pos + 1; 2140191673Sjamie optuio->uio_iov[pos].iov_len = opt->len; 2141191673Sjamie if (opt->value != NULL) { 2142191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) { 2143191673Sjamie bcopy(opt->value, 2144191673Sjamie optuio->uio_iov[pos].iov_base, 2145191673Sjamie opt->len); 2146191673Sjamie } else { 2147191673Sjamie error = copyout(opt->value, 2148191673Sjamie optuio->uio_iov[pos].iov_base, 2149191673Sjamie opt->len); 2150191673Sjamie if (error) 2151191673Sjamie break; 2152191673Sjamie } 2153191673Sjamie } 2154191673Sjamie } 2155185435Sbz } 2156191673Sjamie goto done_errmsg; 2157191673Sjamie 2158191673Sjamie done_deref: 2159191673Sjamie prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); 2160191673Sjamie goto done_errmsg; 2161191673Sjamie 2162191673Sjamie done_unlock_list: 2163191673Sjamie sx_sunlock(&allprison_lock); 2164191673Sjamie done_errmsg: 2165191673Sjamie if (error && errmsg_pos >= 0) { 2166191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 2167191673Sjamie errmsg_pos = 2 * errmsg_pos + 1; 2168191673Sjamie if (errmsg_len > 0) { 2169191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 2170191673Sjamie bcopy(errmsg, 2171191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2172191673Sjamie errmsg_len); 2173191673Sjamie else 2174191673Sjamie copyout(errmsg, 2175191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2176191673Sjamie errmsg_len); 2177191673Sjamie } 2178185435Sbz } 2179191673Sjamie vfs_freeopts(opts); 2180191673Sjamie return (error); 2181191673Sjamie} 2182113275Smike 2183192895Sjamie 2184191673Sjamie/* 2185191673Sjamie * struct jail_remove_args { 2186191673Sjamie * int jid; 2187191673Sjamie * }; 2188191673Sjamie */ 2189191673Sjamieint 2190225617Skmacysys_jail_remove(struct thread *td, struct jail_remove_args *uap) 2191191673Sjamie{ 2192192895Sjamie struct prison *pr, *cpr, *lpr, *tpr; 2193192895Sjamie int descend, error; 2194185435Sbz 2195191673Sjamie error = priv_check(td, PRIV_JAIL_REMOVE); 2196185435Sbz if (error) 2197191673Sjamie return (error); 2198185435Sbz 2199185435Sbz sx_xlock(&allprison_lock); 2200192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2201191673Sjamie if (pr == NULL) { 2202185435Sbz sx_xunlock(&allprison_lock); 2203191673Sjamie return (EINVAL); 2204185435Sbz } 2205185435Sbz 2206192895Sjamie /* Remove all descendants of this prison, then remove this prison. */ 2207192895Sjamie pr->pr_ref++; 2208192895Sjamie pr->pr_flags |= PR_REMOVE; 2209192895Sjamie if (!LIST_EMPTY(&pr->pr_children)) { 2210192895Sjamie mtx_unlock(&pr->pr_mtx); 2211192895Sjamie lpr = NULL; 2212192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 2213192895Sjamie mtx_lock(&cpr->pr_mtx); 2214192895Sjamie if (cpr->pr_ref > 0) { 2215192895Sjamie tpr = cpr; 2216192895Sjamie cpr->pr_ref++; 2217192895Sjamie cpr->pr_flags |= PR_REMOVE; 2218192895Sjamie } else { 2219192895Sjamie /* Already removed - do not do it again. */ 2220192895Sjamie tpr = NULL; 2221192895Sjamie } 2222192895Sjamie mtx_unlock(&cpr->pr_mtx); 2223192895Sjamie if (lpr != NULL) { 2224192895Sjamie mtx_lock(&lpr->pr_mtx); 2225192895Sjamie prison_remove_one(lpr); 2226192895Sjamie sx_xlock(&allprison_lock); 2227192895Sjamie } 2228192895Sjamie lpr = tpr; 2229192895Sjamie } 2230192895Sjamie if (lpr != NULL) { 2231192895Sjamie mtx_lock(&lpr->pr_mtx); 2232192895Sjamie prison_remove_one(lpr); 2233192895Sjamie sx_xlock(&allprison_lock); 2234192895Sjamie } 2235192895Sjamie mtx_lock(&pr->pr_mtx); 2236192895Sjamie } 2237192895Sjamie prison_remove_one(pr); 2238192895Sjamie return (0); 2239192895Sjamie} 2240192895Sjamie 2241192895Sjamiestatic void 2242192895Sjamieprison_remove_one(struct prison *pr) 2243192895Sjamie{ 2244192895Sjamie struct proc *p; 2245192895Sjamie int deuref; 2246192895Sjamie 2247191673Sjamie /* If the prison was persistent, it is not anymore. */ 2248191673Sjamie deuref = 0; 2249191673Sjamie if (pr->pr_flags & PR_PERSIST) { 2250191673Sjamie pr->pr_ref--; 2251191673Sjamie deuref = PD_DEUREF; 2252191673Sjamie pr->pr_flags &= ~PR_PERSIST; 2253179881Sdelphij } 2254113275Smike 2255192895Sjamie /* 2256192895Sjamie * jail_remove added a reference. If that's the only one, remove 2257192895Sjamie * the prison now. 2258192895Sjamie */ 2259192895Sjamie KASSERT(pr->pr_ref > 0, 2260192895Sjamie ("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id)); 2261192895Sjamie if (pr->pr_ref == 1) { 2262191673Sjamie prison_deref(pr, 2263191673Sjamie deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 2264192895Sjamie return; 2265191673Sjamie } 2266191673Sjamie 2267113275Smike mtx_unlock(&pr->pr_mtx); 2268191673Sjamie sx_xunlock(&allprison_lock); 2269191673Sjamie /* 2270191673Sjamie * Kill all processes unfortunate enough to be attached to this prison. 2271191673Sjamie */ 2272191673Sjamie sx_slock(&allproc_lock); 2273191673Sjamie LIST_FOREACH(p, &allproc, p_list) { 2274191673Sjamie PROC_LOCK(p); 2275191673Sjamie if (p->p_state != PRS_NEW && p->p_ucred && 2276191673Sjamie p->p_ucred->cr_prison == pr) 2277225617Skmacy kern_psignal(p, SIGKILL); 2278191673Sjamie PROC_UNLOCK(p); 2279191673Sjamie } 2280191673Sjamie sx_sunlock(&allproc_lock); 2281192895Sjamie /* Remove the temporary reference added by jail_remove. */ 2282191673Sjamie prison_deref(pr, deuref | PD_DEREF); 2283113275Smike} 2284113275Smike 2285190466Sjamie 2286113275Smike/* 2287114168Smike * struct jail_attach_args { 2288114168Smike * int jid; 2289114168Smike * }; 2290113275Smike */ 2291113275Smikeint 2292225617Skmacysys_jail_attach(struct thread *td, struct jail_attach_args *uap) 2293113275Smike{ 2294113275Smike struct prison *pr; 2295191673Sjamie int error; 2296167309Spjd 2297164032Srwatson error = priv_check(td, PRIV_JAIL_ATTACH); 2298126023Snectar if (error) 2299126023Snectar return (error); 2300126023Snectar 2301168401Spjd sx_slock(&allprison_lock); 2302192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2303113275Smike if (pr == NULL) { 2304168401Spjd sx_sunlock(&allprison_lock); 2305113275Smike return (EINVAL); 2306113275Smike } 2307185435Sbz 2308185435Sbz /* 2309185435Sbz * Do not allow a process to attach to a prison that is not 2310191673Sjamie * considered to be "alive". 2311185435Sbz */ 2312191673Sjamie if (pr->pr_uref == 0) { 2313185435Sbz mtx_unlock(&pr->pr_mtx); 2314185435Sbz sx_sunlock(&allprison_lock); 2315185435Sbz return (EINVAL); 2316185435Sbz } 2317191673Sjamie 2318191673Sjamie return (do_jail_attach(td, pr)); 2319191673Sjamie} 2320191673Sjamie 2321191673Sjamiestatic int 2322191673Sjamiedo_jail_attach(struct thread *td, struct prison *pr) 2323191673Sjamie{ 2324192895Sjamie struct prison *ppr; 2325191673Sjamie struct proc *p; 2326191673Sjamie struct ucred *newcred, *oldcred; 2327191673Sjamie int vfslocked, error; 2328191673Sjamie 2329191673Sjamie /* 2330191673Sjamie * XXX: Note that there is a slight race here if two threads 2331191673Sjamie * in the same privileged process attempt to attach to two 2332191673Sjamie * different jails at the same time. It is important for 2333191673Sjamie * user processes not to do this, or they might end up with 2334191673Sjamie * a process root from one prison, but attached to the jail 2335191673Sjamie * of another. 2336191673Sjamie */ 2337113275Smike pr->pr_ref++; 2338191673Sjamie pr->pr_uref++; 2339113275Smike mtx_unlock(&pr->pr_mtx); 2340191673Sjamie 2341191673Sjamie /* Let modules do whatever they need to prepare for attaching. */ 2342191673Sjamie error = osd_jail_call(pr, PR_METHOD_ATTACH, td); 2343191673Sjamie if (error) { 2344191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); 2345191673Sjamie return (error); 2346191673Sjamie } 2347168401Spjd sx_sunlock(&allprison_lock); 2348113275Smike 2349185435Sbz /* 2350185435Sbz * Reparent the newly attached process to this jail. 2351185435Sbz */ 2352192895Sjamie ppr = td->td_ucred->cr_prison; 2353191673Sjamie p = td->td_proc; 2354185435Sbz error = cpuset_setproc_update_set(p, pr->pr_cpuset); 2355185435Sbz if (error) 2356191673Sjamie goto e_revert_osd; 2357185435Sbz 2358150652Scsjp vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2359175202Sattilio vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); 2360113275Smike if ((error = change_dir(pr->pr_root, td)) != 0) 2361113275Smike goto e_unlock; 2362113275Smike#ifdef MAC 2363172930Srwatson if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) 2364113275Smike goto e_unlock; 2365113275Smike#endif 2366175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2367191673Sjamie if ((error = change_root(pr->pr_root, td))) 2368191673Sjamie goto e_unlock_giant; 2369150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2370113275Smike 237184828Sjhb newcred = crget(); 237284828Sjhb PROC_LOCK(p); 237384828Sjhb oldcred = p->p_ucred; 2374113275Smike setsugid(p); 237584828Sjhb crcopy(newcred, oldcred); 2376113630Sjhb newcred->cr_prison = pr; 237784828Sjhb p->p_ucred = newcred; 237884828Sjhb PROC_UNLOCK(p); 2379220137Strasz#ifdef RACCT 2380220137Strasz racct_proc_ucred_changed(p, oldcred, newcred); 2381220137Strasz#endif 238284828Sjhb crfree(oldcred); 2383192895Sjamie prison_deref(ppr, PD_DEREF | PD_DEUREF); 238446155Sphk return (0); 2385191673Sjamie e_unlock: 2386175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2387191673Sjamie e_unlock_giant: 2388150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2389191673Sjamie e_revert_osd: 2390191673Sjamie /* Tell modules this thread is still in its old jail after all. */ 2391192895Sjamie (void)osd_jail_call(ppr, PR_METHOD_ATTACH, td); 2392191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF); 239346155Sphk return (error); 239446155Sphk} 239546155Sphk 2396192895Sjamie 2397113275Smike/* 2398113275Smike * Returns a locked prison instance, or NULL on failure. 2399113275Smike */ 2400168399Spjdstruct prison * 2401113275Smikeprison_find(int prid) 2402113275Smike{ 2403113275Smike struct prison *pr; 2404113275Smike 2405168401Spjd sx_assert(&allprison_lock, SX_LOCKED); 2406191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2407113275Smike if (pr->pr_id == prid) { 2408113275Smike mtx_lock(&pr->pr_mtx); 2409191673Sjamie if (pr->pr_ref > 0) 2410191673Sjamie return (pr); 2411191673Sjamie mtx_unlock(&pr->pr_mtx); 2412113275Smike } 2413113275Smike } 2414113275Smike return (NULL); 2415113275Smike} 2416113275Smike 2417191673Sjamie/* 2418192895Sjamie * Find a prison that is a descendant of mypr. Returns a locked prison or NULL. 2419191673Sjamie */ 2420191673Sjamiestruct prison * 2421192895Sjamieprison_find_child(struct prison *mypr, int prid) 2422191673Sjamie{ 2423192895Sjamie struct prison *pr; 2424192895Sjamie int descend; 2425192895Sjamie 2426192895Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2427192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2428192895Sjamie if (pr->pr_id == prid) { 2429192895Sjamie mtx_lock(&pr->pr_mtx); 2430192895Sjamie if (pr->pr_ref > 0) 2431192895Sjamie return (pr); 2432192895Sjamie mtx_unlock(&pr->pr_mtx); 2433192895Sjamie } 2434192895Sjamie } 2435192895Sjamie return (NULL); 2436192895Sjamie} 2437192895Sjamie 2438192895Sjamie/* 2439192895Sjamie * Look for the name relative to mypr. Returns a locked prison or NULL. 2440192895Sjamie */ 2441192895Sjamiestruct prison * 2442192895Sjamieprison_find_name(struct prison *mypr, const char *name) 2443192895Sjamie{ 2444191673Sjamie struct prison *pr, *deadpr; 2445192895Sjamie size_t mylen; 2446192895Sjamie int descend; 2447191673Sjamie 2448191673Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2449192895Sjamie mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1; 2450191673Sjamie again: 2451191673Sjamie deadpr = NULL; 2452192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2453192895Sjamie if (!strcmp(pr->pr_name + mylen, name)) { 2454191673Sjamie mtx_lock(&pr->pr_mtx); 2455191673Sjamie if (pr->pr_ref > 0) { 2456191673Sjamie if (pr->pr_uref > 0) 2457191673Sjamie return (pr); 2458191673Sjamie deadpr = pr; 2459191673Sjamie } 2460191673Sjamie mtx_unlock(&pr->pr_mtx); 2461191673Sjamie } 2462191673Sjamie } 2463192895Sjamie /* There was no valid prison - perhaps there was a dying one. */ 2464191673Sjamie if (deadpr != NULL) { 2465191673Sjamie mtx_lock(&deadpr->pr_mtx); 2466191673Sjamie if (deadpr->pr_ref == 0) { 2467191673Sjamie mtx_unlock(&deadpr->pr_mtx); 2468191673Sjamie goto again; 2469191673Sjamie } 2470191673Sjamie } 2471191673Sjamie return (deadpr); 2472191673Sjamie} 2473191673Sjamie 2474191673Sjamie/* 2475192895Sjamie * See if a prison has the specific flag set. 2476192895Sjamie */ 2477192895Sjamieint 2478192895Sjamieprison_flag(struct ucred *cred, unsigned flag) 2479192895Sjamie{ 2480192895Sjamie 2481192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2482192895Sjamie return (cred->cr_prison->pr_flags & flag); 2483192895Sjamie} 2484192895Sjamie 2485192895Sjamieint 2486192895Sjamieprison_allow(struct ucred *cred, unsigned flag) 2487192895Sjamie{ 2488192895Sjamie 2489192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2490192895Sjamie return (cred->cr_prison->pr_allow & flag); 2491192895Sjamie} 2492192895Sjamie 2493192895Sjamie/* 2494191673Sjamie * Remove a prison reference. If that was the last reference, remove the 2495191673Sjamie * prison itself - but not in this context in case there are locks held. 2496191673Sjamie */ 249772786Srwatsonvoid 2498185029Spjdprison_free_locked(struct prison *pr) 249972786Srwatson{ 250072786Srwatson 2501185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 250272786Srwatson pr->pr_ref--; 250372786Srwatson if (pr->pr_ref == 0) { 2504168483Spjd mtx_unlock(&pr->pr_mtx); 2505124882Srwatson TASK_INIT(&pr->pr_task, 0, prison_complete, pr); 2506144660Sjeff taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 250787275Srwatson return; 250872786Srwatson } 250987275Srwatson mtx_unlock(&pr->pr_mtx); 251072786Srwatson} 251172786Srwatson 2512185029Spjdvoid 2513185029Spjdprison_free(struct prison *pr) 2514185029Spjd{ 2515185029Spjd 2516185029Spjd mtx_lock(&pr->pr_mtx); 2517185029Spjd prison_free_locked(pr); 2518185029Spjd} 2519185029Spjd 2520124882Srwatsonstatic void 2521124882Srwatsonprison_complete(void *context, int pending) 2522124882Srwatson{ 2523191673Sjamie 2524191673Sjamie prison_deref((struct prison *)context, 0); 2525191673Sjamie} 2526191673Sjamie 2527191673Sjamie/* 2528191673Sjamie * Remove a prison reference (usually). This internal version assumes no 2529191673Sjamie * mutexes are held, except perhaps the prison itself. If there are no more 2530191673Sjamie * references, release and delist the prison. On completion, the prison lock 2531191673Sjamie * and the allprison lock are both unlocked. 2532191673Sjamie */ 2533191673Sjamiestatic void 2534191673Sjamieprison_deref(struct prison *pr, int flags) 2535191673Sjamie{ 2536192895Sjamie struct prison *ppr, *tpr; 2537150652Scsjp int vfslocked; 2538124882Srwatson 2539191673Sjamie if (!(flags & PD_LOCKED)) 2540191673Sjamie mtx_lock(&pr->pr_mtx); 2541225191Sjamie for (;;) { 2542225191Sjamie if (flags & PD_DEUREF) { 2543225191Sjamie pr->pr_uref--; 2544225191Sjamie KASSERT(prison0.pr_uref != 0, ("prison0 pr_uref=0")); 2545192895Sjamie } 2546192895Sjamie if (flags & PD_DEREF) 2547192895Sjamie pr->pr_ref--; 2548192895Sjamie /* If the prison still has references, nothing else to do. */ 2549192895Sjamie if (pr->pr_ref > 0) { 2550192895Sjamie mtx_unlock(&pr->pr_mtx); 2551192895Sjamie if (flags & PD_LIST_SLOCKED) 2552192895Sjamie sx_sunlock(&allprison_lock); 2553192895Sjamie else if (flags & PD_LIST_XLOCKED) 2554192895Sjamie sx_xunlock(&allprison_lock); 2555192895Sjamie return; 2556191673Sjamie } 2557191673Sjamie 2558192895Sjamie mtx_unlock(&pr->pr_mtx); 2559192895Sjamie if (flags & PD_LIST_SLOCKED) { 2560192895Sjamie if (!sx_try_upgrade(&allprison_lock)) { 2561192895Sjamie sx_sunlock(&allprison_lock); 2562192895Sjamie sx_xlock(&allprison_lock); 2563192895Sjamie } 2564192895Sjamie } else if (!(flags & PD_LIST_XLOCKED)) 2565192895Sjamie sx_xlock(&allprison_lock); 2566168489Spjd 2567192895Sjamie TAILQ_REMOVE(&allprison, pr, pr_list); 2568192895Sjamie LIST_REMOVE(pr, pr_sibling); 2569192895Sjamie ppr = pr->pr_parent; 2570192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 2571194762Sjamie tpr->pr_childcount--; 2572196592Sjamie sx_xunlock(&allprison_lock); 2573192895Sjamie 2574194251Sjamie#ifdef VIMAGE 2575196505Szec if (pr->pr_vnet != ppr->pr_vnet) 2576194251Sjamie vnet_destroy(pr->pr_vnet); 2577194251Sjamie#endif 2578192895Sjamie if (pr->pr_root != NULL) { 2579192895Sjamie vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2580192895Sjamie vrele(pr->pr_root); 2581192895Sjamie VFS_UNLOCK_GIANT(vfslocked); 2582192895Sjamie } 2583192895Sjamie mtx_destroy(&pr->pr_mtx); 2584191673Sjamie#ifdef INET 2585192895Sjamie free(pr->pr_ip4, M_PRISON); 2586191673Sjamie#endif 2587185435Sbz#ifdef INET6 2588192895Sjamie free(pr->pr_ip6, M_PRISON); 2589185435Sbz#endif 2590192895Sjamie if (pr->pr_cpuset != NULL) 2591192895Sjamie cpuset_rel(pr->pr_cpuset); 2592192895Sjamie osd_jail_exit(pr); 2593221362Strasz#ifdef RACCT 2594221362Strasz prison_racct_detach(pr); 2595220163Strasz#endif 2596192895Sjamie free(pr, M_PRISON); 2597192895Sjamie 2598192895Sjamie /* Removing a prison frees a reference on its parent. */ 2599192895Sjamie pr = ppr; 2600192895Sjamie mtx_lock(&pr->pr_mtx); 2601225191Sjamie flags = PD_DEREF | PD_DEUREF; 2602192895Sjamie } 2603124882Srwatson} 2604124882Srwatson 260572786Srwatsonvoid 2606185029Spjdprison_hold_locked(struct prison *pr) 260772786Srwatson{ 260872786Srwatson 2609185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2610168489Spjd KASSERT(pr->pr_ref > 0, 2611191671Sjamie ("Trying to hold dead prison (jid=%d).", pr->pr_id)); 261272786Srwatson pr->pr_ref++; 2613185029Spjd} 2614185029Spjd 2615185029Spjdvoid 2616185029Spjdprison_hold(struct prison *pr) 2617185029Spjd{ 2618185029Spjd 2619185029Spjd mtx_lock(&pr->pr_mtx); 2620185029Spjd prison_hold_locked(pr); 262187275Srwatson mtx_unlock(&pr->pr_mtx); 262272786Srwatson} 262372786Srwatson 2624185435Sbzvoid 2625185435Sbzprison_proc_hold(struct prison *pr) 262687275Srwatson{ 262787275Srwatson 2628185435Sbz mtx_lock(&pr->pr_mtx); 2629191673Sjamie KASSERT(pr->pr_uref > 0, 2630191673Sjamie ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); 2631191673Sjamie pr->pr_uref++; 2632185435Sbz mtx_unlock(&pr->pr_mtx); 263387275Srwatson} 263487275Srwatson 2635185435Sbzvoid 2636185435Sbzprison_proc_free(struct prison *pr) 2637185435Sbz{ 2638185435Sbz 2639185435Sbz mtx_lock(&pr->pr_mtx); 2640191673Sjamie KASSERT(pr->pr_uref > 0, 2641191673Sjamie ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); 2642191673Sjamie prison_deref(pr, PD_DEUREF | PD_LOCKED); 2643185435Sbz} 2644185435Sbz 2645185435Sbz 2646185435Sbz#ifdef INET 2647185435Sbz/* 2648192895Sjamie * Restrict a prison's IP address list with its parent's, possibly replacing 2649192895Sjamie * it. Return true if the replacement buffer was used (or would have been). 2650192895Sjamie */ 2651192895Sjamiestatic int 2652192895Sjamieprison_restrict_ip4(struct prison *pr, struct in_addr *newip4) 2653192895Sjamie{ 2654192895Sjamie int ii, ij, used; 2655192895Sjamie struct prison *ppr; 2656192895Sjamie 2657192895Sjamie ppr = pr->pr_parent; 2658192895Sjamie if (!(pr->pr_flags & PR_IP4_USER)) { 2659192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2660192895Sjamie if (pr->pr_ip4s < ppr->pr_ip4s) { 2661192895Sjamie /* 2662192895Sjamie * There's no room for the parent's list. Use the 2663192895Sjamie * new list buffer, which is assumed to be big enough 2664192895Sjamie * (if it was passed). If there's no buffer, try to 2665192895Sjamie * allocate one. 2666192895Sjamie */ 2667192895Sjamie used = 1; 2668192895Sjamie if (newip4 == NULL) { 2669192895Sjamie newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4), 2670192895Sjamie M_PRISON, M_NOWAIT); 2671192895Sjamie if (newip4 != NULL) 2672192895Sjamie used = 0; 2673192895Sjamie } 2674192895Sjamie if (newip4 != NULL) { 2675192895Sjamie bcopy(ppr->pr_ip4, newip4, 2676192895Sjamie ppr->pr_ip4s * sizeof(*newip4)); 2677192895Sjamie free(pr->pr_ip4, M_PRISON); 2678192895Sjamie pr->pr_ip4 = newip4; 2679192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2680192895Sjamie } 2681192895Sjamie return (used); 2682192895Sjamie } 2683192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2684192895Sjamie if (pr->pr_ip4s > 0) 2685192895Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 2686192895Sjamie pr->pr_ip4s * sizeof(*newip4)); 2687192895Sjamie else if (pr->pr_ip4 != NULL) { 2688192895Sjamie free(pr->pr_ip4, M_PRISON); 2689192895Sjamie pr->pr_ip4 = NULL; 2690192895Sjamie } 2691195974Sjamie } else if (pr->pr_ip4s > 0) { 2692192895Sjamie /* Remove addresses that aren't in the parent. */ 2693192895Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 2694192895Sjamie if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 2695192895Sjamie break; 2696192895Sjamie if (ij < ppr->pr_ip4s) 2697192895Sjamie ii = 1; 2698192895Sjamie else { 2699192895Sjamie bcopy(pr->pr_ip4 + 1, pr->pr_ip4, 2700192895Sjamie --pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2701192895Sjamie ii = 0; 2702192895Sjamie } 2703192895Sjamie for (ij = 1; ii < pr->pr_ip4s; ) { 2704192895Sjamie if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) { 2705192895Sjamie ii++; 2706192895Sjamie continue; 2707192895Sjamie } 2708192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2709192895Sjamie qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) { 2710192895Sjamie case -1: 2711192895Sjamie bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii, 2712192895Sjamie (--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4)); 2713192895Sjamie break; 2714192895Sjamie case 0: 2715192895Sjamie ii++; 2716192895Sjamie ij++; 2717192895Sjamie break; 2718192895Sjamie case 1: 2719192895Sjamie ij++; 2720192895Sjamie break; 2721192895Sjamie } 2722192895Sjamie } 2723192895Sjamie if (pr->pr_ip4s == 0) { 2724195870Sjamie pr->pr_flags |= PR_IP4_DISABLE; 2725192895Sjamie free(pr->pr_ip4, M_PRISON); 2726192895Sjamie pr->pr_ip4 = NULL; 2727192895Sjamie } 2728192895Sjamie } 2729192895Sjamie return (0); 2730192895Sjamie} 2731192895Sjamie 2732192895Sjamie/* 2733185435Sbz * Pass back primary IPv4 address of this jail. 2734185435Sbz * 2735192895Sjamie * If not restricted return success but do not alter the address. Caller has 2736192895Sjamie * to make sure to initialize it correctly (e.g. INADDR_ANY). 2737185435Sbz * 2738188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2739188144Sjamie * Address returned in NBO. 2740185435Sbz */ 274146155Sphkint 2742187684Sbzprison_get_ip4(struct ucred *cred, struct in_addr *ia) 274346155Sphk{ 2744191673Sjamie struct prison *pr; 274546155Sphk 2746185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2747185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2748185435Sbz 2749192895Sjamie pr = cred->cr_prison; 2750192895Sjamie if (!(pr->pr_flags & PR_IP4)) 275146155Sphk return (0); 2752191673Sjamie mtx_lock(&pr->pr_mtx); 2753192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2754192895Sjamie mtx_unlock(&pr->pr_mtx); 2755192895Sjamie return (0); 2756192895Sjamie } 2757191673Sjamie if (pr->pr_ip4 == NULL) { 2758191673Sjamie mtx_unlock(&pr->pr_mtx); 2759188144Sjamie return (EAFNOSUPPORT); 2760191673Sjamie } 2761185435Sbz 2762191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2763191673Sjamie mtx_unlock(&pr->pr_mtx); 2764185435Sbz return (0); 2765185435Sbz} 2766185435Sbz 2767185435Sbz/* 2768202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 2769202468Sbz * We will return 0 if we should bypass source address selection in favour 2770202468Sbz * of the primary jail IPv4 address. Only in this case *ia will be updated and 2771202468Sbz * returned in NBO. 2772202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv4. 2773202468Sbz */ 2774202468Sbzint 2775202468Sbzprison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia) 2776202468Sbz{ 2777202468Sbz struct prison *pr; 2778202468Sbz struct in_addr lia; 2779202468Sbz int error; 2780202468Sbz 2781202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2782202468Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2783202468Sbz 2784202468Sbz if (!jailed(cred)) 2785202468Sbz return (1); 2786202468Sbz 2787202468Sbz pr = cred->cr_prison; 2788202468Sbz if (pr->pr_flags & PR_IP4_SADDRSEL) 2789202468Sbz return (1); 2790202468Sbz 2791202468Sbz lia.s_addr = INADDR_ANY; 2792202468Sbz error = prison_get_ip4(cred, &lia); 2793202468Sbz if (error) 2794202468Sbz return (error); 2795202468Sbz if (lia.s_addr == INADDR_ANY) 2796202468Sbz return (1); 2797202468Sbz 2798202468Sbz ia->s_addr = lia.s_addr; 2799202468Sbz return (0); 2800202468Sbz} 2801202468Sbz 2802202468Sbz/* 2803192895Sjamie * Return true if pr1 and pr2 have the same IPv4 address restrictions. 2804192895Sjamie */ 2805192895Sjamieint 2806192895Sjamieprison_equal_ip4(struct prison *pr1, struct prison *pr2) 2807192895Sjamie{ 2808192895Sjamie 2809192895Sjamie if (pr1 == pr2) 2810192895Sjamie return (1); 2811192895Sjamie 2812192895Sjamie /* 2813195974Sjamie * No need to lock since the PR_IP4_USER flag can't be altered for 2814195974Sjamie * existing prisons. 2815192895Sjamie */ 2816195945Sjamie while (pr1 != &prison0 && 2817195945Sjamie#ifdef VIMAGE 2818195945Sjamie !(pr1->pr_flags & PR_VNET) && 2819195945Sjamie#endif 2820195945Sjamie !(pr1->pr_flags & PR_IP4_USER)) 2821192895Sjamie pr1 = pr1->pr_parent; 2822195945Sjamie while (pr2 != &prison0 && 2823195945Sjamie#ifdef VIMAGE 2824195945Sjamie !(pr2->pr_flags & PR_VNET) && 2825195945Sjamie#endif 2826195945Sjamie !(pr2->pr_flags & PR_IP4_USER)) 2827192895Sjamie pr2 = pr2->pr_parent; 2828192895Sjamie return (pr1 == pr2); 2829192895Sjamie} 2830192895Sjamie 2831192895Sjamie/* 2832185435Sbz * Make sure our (source) address is set to something meaningful to this 2833185435Sbz * jail. 2834185435Sbz * 2835192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2836192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2837192895Sjamie * doesn't allow IPv4. Address passed in in NBO and returned in NBO. 2838185435Sbz */ 2839185435Sbzint 2840185435Sbzprison_local_ip4(struct ucred *cred, struct in_addr *ia) 2841185435Sbz{ 2842191673Sjamie struct prison *pr; 2843185435Sbz struct in_addr ia0; 2844191673Sjamie int error; 2845185435Sbz 2846185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2847185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2848185435Sbz 2849192895Sjamie pr = cred->cr_prison; 2850192895Sjamie if (!(pr->pr_flags & PR_IP4)) 285146155Sphk return (0); 2852191673Sjamie mtx_lock(&pr->pr_mtx); 2853192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2854192895Sjamie mtx_unlock(&pr->pr_mtx); 2855192895Sjamie return (0); 2856192895Sjamie } 2857191673Sjamie if (pr->pr_ip4 == NULL) { 2858191673Sjamie mtx_unlock(&pr->pr_mtx); 2859188144Sjamie return (EAFNOSUPPORT); 2860191673Sjamie } 2861185435Sbz 2862185435Sbz ia0.s_addr = ntohl(ia->s_addr); 2863185435Sbz if (ia0.s_addr == INADDR_LOOPBACK) { 2864191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2865191673Sjamie mtx_unlock(&pr->pr_mtx); 2866185435Sbz return (0); 286746155Sphk } 2868185435Sbz 2869188144Sjamie if (ia0.s_addr == INADDR_ANY) { 2870188144Sjamie /* 2871188144Sjamie * In case there is only 1 IPv4 address, bind directly. 2872188144Sjamie */ 2873191673Sjamie if (pr->pr_ip4s == 1) 2874191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2875191673Sjamie mtx_unlock(&pr->pr_mtx); 2876185435Sbz return (0); 2877185435Sbz } 2878185435Sbz 2879191673Sjamie error = _prison_check_ip4(pr, ia); 2880191673Sjamie mtx_unlock(&pr->pr_mtx); 2881191673Sjamie return (error); 2882185435Sbz} 2883185435Sbz 2884185435Sbz/* 2885185435Sbz * Rewrite destination address in case we will connect to loopback address. 2886185435Sbz * 2887188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2888188144Sjamie * Address passed in in NBO and returned in NBO. 2889185435Sbz */ 2890185435Sbzint 2891185435Sbzprison_remote_ip4(struct ucred *cred, struct in_addr *ia) 2892185435Sbz{ 2893191673Sjamie struct prison *pr; 2894185435Sbz 2895185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2896185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2897185435Sbz 2898192895Sjamie pr = cred->cr_prison; 2899192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2900185435Sbz return (0); 2901191673Sjamie mtx_lock(&pr->pr_mtx); 2902192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2903192895Sjamie mtx_unlock(&pr->pr_mtx); 2904192895Sjamie return (0); 2905192895Sjamie } 2906191673Sjamie if (pr->pr_ip4 == NULL) { 2907191673Sjamie mtx_unlock(&pr->pr_mtx); 2908188144Sjamie return (EAFNOSUPPORT); 2909191673Sjamie } 2910188144Sjamie 2911185435Sbz if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { 2912191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2913191673Sjamie mtx_unlock(&pr->pr_mtx); 2914185435Sbz return (0); 2915185435Sbz } 2916185435Sbz 2917185435Sbz /* 2918185435Sbz * Return success because nothing had to be changed. 2919185435Sbz */ 2920191673Sjamie mtx_unlock(&pr->pr_mtx); 2921185435Sbz return (0); 2922185435Sbz} 2923185435Sbz 2924185435Sbz/* 2925188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 2926185435Sbz * 2927192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2928192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2929192895Sjamie * doesn't allow IPv4. Address passed in in NBO. 2930185435Sbz */ 2931185435Sbzstatic int 2932185435Sbz_prison_check_ip4(struct prison *pr, struct in_addr *ia) 2933185435Sbz{ 2934185435Sbz int i, a, z, d; 2935185435Sbz 2936185435Sbz /* 2937185435Sbz * Check the primary IP. 2938185435Sbz */ 2939185435Sbz if (pr->pr_ip4[0].s_addr == ia->s_addr) 2940188144Sjamie return (0); 2941185435Sbz 2942185435Sbz /* 2943185435Sbz * All the other IPs are sorted so we can do a binary search. 2944185435Sbz */ 2945185435Sbz a = 0; 2946185435Sbz z = pr->pr_ip4s - 2; 2947185435Sbz while (a <= z) { 2948185435Sbz i = (a + z) / 2; 2949185435Sbz d = qcmp_v4(&pr->pr_ip4[i+1], ia); 2950185435Sbz if (d > 0) 2951185435Sbz z = i - 1; 2952185435Sbz else if (d < 0) 2953185435Sbz a = i + 1; 295481114Srwatson else 2955188144Sjamie return (0); 2956185435Sbz } 2957188144Sjamie 2958188144Sjamie return (EADDRNOTAVAIL); 2959185435Sbz} 2960185435Sbz 2961185435Sbzint 2962185435Sbzprison_check_ip4(struct ucred *cred, struct in_addr *ia) 2963185435Sbz{ 2964191673Sjamie struct prison *pr; 2965191673Sjamie int error; 2966185435Sbz 2967185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2968185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2969185435Sbz 2970192895Sjamie pr = cred->cr_prison; 2971192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2972188144Sjamie return (0); 2973191673Sjamie mtx_lock(&pr->pr_mtx); 2974192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2975192895Sjamie mtx_unlock(&pr->pr_mtx); 2976192895Sjamie return (0); 2977192895Sjamie } 2978191673Sjamie if (pr->pr_ip4 == NULL) { 2979191673Sjamie mtx_unlock(&pr->pr_mtx); 2980188144Sjamie return (EAFNOSUPPORT); 2981191673Sjamie } 2982185435Sbz 2983191673Sjamie error = _prison_check_ip4(pr, ia); 2984191673Sjamie mtx_unlock(&pr->pr_mtx); 2985191673Sjamie return (error); 2986185435Sbz} 2987185435Sbz#endif 2988185435Sbz 2989185435Sbz#ifdef INET6 2990192895Sjamiestatic int 2991192895Sjamieprison_restrict_ip6(struct prison *pr, struct in6_addr *newip6) 2992192895Sjamie{ 2993192895Sjamie int ii, ij, used; 2994192895Sjamie struct prison *ppr; 2995192895Sjamie 2996192895Sjamie ppr = pr->pr_parent; 2997192895Sjamie if (!(pr->pr_flags & PR_IP6_USER)) { 2998192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2999192895Sjamie if (pr->pr_ip6s < ppr->pr_ip6s) { 3000192895Sjamie /* 3001192895Sjamie * There's no room for the parent's list. Use the 3002192895Sjamie * new list buffer, which is assumed to be big enough 3003192895Sjamie * (if it was passed). If there's no buffer, try to 3004192895Sjamie * allocate one. 3005192895Sjamie */ 3006192895Sjamie used = 1; 3007192895Sjamie if (newip6 == NULL) { 3008192895Sjamie newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6), 3009192895Sjamie M_PRISON, M_NOWAIT); 3010192895Sjamie if (newip6 != NULL) 3011192895Sjamie used = 0; 3012192895Sjamie } 3013192895Sjamie if (newip6 != NULL) { 3014192895Sjamie bcopy(ppr->pr_ip6, newip6, 3015192895Sjamie ppr->pr_ip6s * sizeof(*newip6)); 3016192895Sjamie free(pr->pr_ip6, M_PRISON); 3017192895Sjamie pr->pr_ip6 = newip6; 3018192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 3019192895Sjamie } 3020192895Sjamie return (used); 3021192895Sjamie } 3022192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 3023192895Sjamie if (pr->pr_ip6s > 0) 3024192895Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 3025192895Sjamie pr->pr_ip6s * sizeof(*newip6)); 3026192895Sjamie else if (pr->pr_ip6 != NULL) { 3027192895Sjamie free(pr->pr_ip6, M_PRISON); 3028192895Sjamie pr->pr_ip6 = NULL; 3029192895Sjamie } 3030195974Sjamie } else if (pr->pr_ip6s > 0) { 3031192895Sjamie /* Remove addresses that aren't in the parent. */ 3032192895Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 3033192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], 3034192895Sjamie &ppr->pr_ip6[ij])) 3035192895Sjamie break; 3036192895Sjamie if (ij < ppr->pr_ip6s) 3037192895Sjamie ii = 1; 3038192895Sjamie else { 3039192895Sjamie bcopy(pr->pr_ip6 + 1, pr->pr_ip6, 3040192895Sjamie --pr->pr_ip6s * sizeof(*pr->pr_ip6)); 3041192895Sjamie ii = 0; 3042192895Sjamie } 3043192895Sjamie for (ij = 1; ii < pr->pr_ip6s; ) { 3044192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii], 3045192895Sjamie &ppr->pr_ip6[0])) { 3046192895Sjamie ii++; 3047192895Sjamie continue; 3048192895Sjamie } 3049192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 3050192895Sjamie qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) { 3051192895Sjamie case -1: 3052192895Sjamie bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii, 3053192895Sjamie (--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6)); 3054192895Sjamie break; 3055192895Sjamie case 0: 3056192895Sjamie ii++; 3057192895Sjamie ij++; 3058192895Sjamie break; 3059192895Sjamie case 1: 3060192895Sjamie ij++; 3061192895Sjamie break; 3062192895Sjamie } 3063192895Sjamie } 3064192895Sjamie if (pr->pr_ip6s == 0) { 3065195870Sjamie pr->pr_flags |= PR_IP6_DISABLE; 3066192895Sjamie free(pr->pr_ip6, M_PRISON); 3067192895Sjamie pr->pr_ip6 = NULL; 3068192895Sjamie } 3069192895Sjamie } 3070192895Sjamie return 0; 3071192895Sjamie} 3072192895Sjamie 3073185435Sbz/* 3074185435Sbz * Pass back primary IPv6 address for this jail. 3075185435Sbz * 3076192895Sjamie * If not restricted return success but do not alter the address. Caller has 3077192895Sjamie * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). 3078185435Sbz * 3079188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3080185435Sbz */ 3081185435Sbzint 3082187684Sbzprison_get_ip6(struct ucred *cred, struct in6_addr *ia6) 3083185435Sbz{ 3084191673Sjamie struct prison *pr; 3085185435Sbz 3086185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3087185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3088185435Sbz 3089192895Sjamie pr = cred->cr_prison; 3090192895Sjamie if (!(pr->pr_flags & PR_IP6)) 309181114Srwatson return (0); 3092191673Sjamie mtx_lock(&pr->pr_mtx); 3093192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3094192895Sjamie mtx_unlock(&pr->pr_mtx); 3095192895Sjamie return (0); 3096192895Sjamie } 3097191673Sjamie if (pr->pr_ip6 == NULL) { 3098191673Sjamie mtx_unlock(&pr->pr_mtx); 3099188144Sjamie return (EAFNOSUPPORT); 3100191673Sjamie } 3101188144Sjamie 3102191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3103191673Sjamie mtx_unlock(&pr->pr_mtx); 3104185435Sbz return (0); 3105185435Sbz} 3106185435Sbz 3107185435Sbz/* 3108202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 3109202468Sbz * We will return 0 if we should bypass source address selection in favour 3110202468Sbz * of the primary jail IPv6 address. Only in this case *ia will be updated and 3111202468Sbz * returned in NBO. 3112202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv6. 3113202468Sbz */ 3114202468Sbzint 3115202468Sbzprison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) 3116202468Sbz{ 3117202468Sbz struct prison *pr; 3118202468Sbz struct in6_addr lia6; 3119202468Sbz int error; 3120202468Sbz 3121202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3122202468Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3123202468Sbz 3124202468Sbz if (!jailed(cred)) 3125202468Sbz return (1); 3126202468Sbz 3127202468Sbz pr = cred->cr_prison; 3128202468Sbz if (pr->pr_flags & PR_IP6_SADDRSEL) 3129202468Sbz return (1); 3130202468Sbz 3131202468Sbz lia6 = in6addr_any; 3132202468Sbz error = prison_get_ip6(cred, &lia6); 3133202468Sbz if (error) 3134202468Sbz return (error); 3135202468Sbz if (IN6_IS_ADDR_UNSPECIFIED(&lia6)) 3136202468Sbz return (1); 3137202468Sbz 3138202468Sbz bcopy(&lia6, ia6, sizeof(struct in6_addr)); 3139202468Sbz return (0); 3140202468Sbz} 3141202468Sbz 3142202468Sbz/* 3143192895Sjamie * Return true if pr1 and pr2 have the same IPv6 address restrictions. 3144192895Sjamie */ 3145192895Sjamieint 3146192895Sjamieprison_equal_ip6(struct prison *pr1, struct prison *pr2) 3147192895Sjamie{ 3148192895Sjamie 3149192895Sjamie if (pr1 == pr2) 3150192895Sjamie return (1); 3151192895Sjamie 3152195945Sjamie while (pr1 != &prison0 && 3153195945Sjamie#ifdef VIMAGE 3154195945Sjamie !(pr1->pr_flags & PR_VNET) && 3155195945Sjamie#endif 3156195945Sjamie !(pr1->pr_flags & PR_IP6_USER)) 3157192895Sjamie pr1 = pr1->pr_parent; 3158195945Sjamie while (pr2 != &prison0 && 3159195945Sjamie#ifdef VIMAGE 3160195945Sjamie !(pr2->pr_flags & PR_VNET) && 3161195945Sjamie#endif 3162195945Sjamie !(pr2->pr_flags & PR_IP6_USER)) 3163192895Sjamie pr2 = pr2->pr_parent; 3164192895Sjamie return (pr1 == pr2); 3165192895Sjamie} 3166192895Sjamie 3167192895Sjamie/* 3168185435Sbz * Make sure our (source) address is set to something meaningful to this jail. 3169185435Sbz * 3170185435Sbz * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) 3171185435Sbz * when needed while binding. 3172185435Sbz * 3173192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3174192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3175192895Sjamie * doesn't allow IPv6. 3176185435Sbz */ 3177185435Sbzint 3178185435Sbzprison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) 3179185435Sbz{ 3180191673Sjamie struct prison *pr; 3181191673Sjamie int error; 3182185435Sbz 3183185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3184185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3185185435Sbz 3186192895Sjamie pr = cred->cr_prison; 3187192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3188185435Sbz return (0); 3189191673Sjamie mtx_lock(&pr->pr_mtx); 3190192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3191192895Sjamie mtx_unlock(&pr->pr_mtx); 3192192895Sjamie return (0); 3193192895Sjamie } 3194191673Sjamie if (pr->pr_ip6 == NULL) { 3195191673Sjamie mtx_unlock(&pr->pr_mtx); 3196188144Sjamie return (EAFNOSUPPORT); 3197191673Sjamie } 3198188144Sjamie 3199185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3200191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3201191673Sjamie mtx_unlock(&pr->pr_mtx); 3202185435Sbz return (0); 320381114Srwatson } 3204185435Sbz 3205188144Sjamie if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { 3206188144Sjamie /* 3207188144Sjamie * In case there is only 1 IPv6 address, and v6only is true, 3208188144Sjamie * then bind directly. 3209188144Sjamie */ 3210191673Sjamie if (v6only != 0 && pr->pr_ip6s == 1) 3211191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3212191673Sjamie mtx_unlock(&pr->pr_mtx); 3213185435Sbz return (0); 3214185435Sbz } 3215188144Sjamie 3216191673Sjamie error = _prison_check_ip6(pr, ia6); 3217191673Sjamie mtx_unlock(&pr->pr_mtx); 3218191673Sjamie return (error); 3219185435Sbz} 3220185435Sbz 3221185435Sbz/* 3222185435Sbz * Rewrite destination address in case we will connect to loopback address. 3223185435Sbz * 3224188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3225185435Sbz */ 3226185435Sbzint 3227185435Sbzprison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) 3228185435Sbz{ 3229191673Sjamie struct prison *pr; 3230185435Sbz 3231185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3232185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3233185435Sbz 3234192895Sjamie pr = cred->cr_prison; 3235192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3236185435Sbz return (0); 3237191673Sjamie mtx_lock(&pr->pr_mtx); 3238192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3239192895Sjamie mtx_unlock(&pr->pr_mtx); 3240192895Sjamie return (0); 3241192895Sjamie } 3242191673Sjamie if (pr->pr_ip6 == NULL) { 3243191673Sjamie mtx_unlock(&pr->pr_mtx); 3244188144Sjamie return (EAFNOSUPPORT); 3245191673Sjamie } 3246188144Sjamie 3247185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3248191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3249191673Sjamie mtx_unlock(&pr->pr_mtx); 3250185435Sbz return (0); 3251185435Sbz } 3252185435Sbz 3253185435Sbz /* 3254185435Sbz * Return success because nothing had to be changed. 3255185435Sbz */ 3256191673Sjamie mtx_unlock(&pr->pr_mtx); 325746155Sphk return (0); 325846155Sphk} 325946155Sphk 3260185435Sbz/* 3261188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3262185435Sbz * 3263192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3264192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3265192895Sjamie * doesn't allow IPv6. 3266185435Sbz */ 3267185435Sbzstatic int 3268185435Sbz_prison_check_ip6(struct prison *pr, struct in6_addr *ia6) 326946155Sphk{ 3270185435Sbz int i, a, z, d; 327146155Sphk 3272185435Sbz /* 3273185435Sbz * Check the primary IP. 3274185435Sbz */ 3275185435Sbz if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) 3276188144Sjamie return (0); 3277185435Sbz 3278185435Sbz /* 3279185435Sbz * All the other IPs are sorted so we can do a binary search. 3280185435Sbz */ 3281185435Sbz a = 0; 3282185435Sbz z = pr->pr_ip6s - 2; 3283185435Sbz while (a <= z) { 3284185435Sbz i = (a + z) / 2; 3285185435Sbz d = qcmp_v6(&pr->pr_ip6[i+1], ia6); 3286185435Sbz if (d > 0) 3287185435Sbz z = i - 1; 3288185435Sbz else if (d < 0) 3289185435Sbz a = i + 1; 329046155Sphk else 3291188144Sjamie return (0); 329246155Sphk } 3293188144Sjamie 3294188144Sjamie return (EADDRNOTAVAIL); 329546155Sphk} 329646155Sphk 329746155Sphkint 3298185435Sbzprison_check_ip6(struct ucred *cred, struct in6_addr *ia6) 3299185435Sbz{ 3300191673Sjamie struct prison *pr; 3301191673Sjamie int error; 3302185435Sbz 3303185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3304185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3305185435Sbz 3306192895Sjamie pr = cred->cr_prison; 3307192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3308188144Sjamie return (0); 3309191673Sjamie mtx_lock(&pr->pr_mtx); 3310192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3311192895Sjamie mtx_unlock(&pr->pr_mtx); 3312192895Sjamie return (0); 3313192895Sjamie } 3314191673Sjamie if (pr->pr_ip6 == NULL) { 3315191673Sjamie mtx_unlock(&pr->pr_mtx); 3316188144Sjamie return (EAFNOSUPPORT); 3317191673Sjamie } 3318185435Sbz 3319191673Sjamie error = _prison_check_ip6(pr, ia6); 3320191673Sjamie mtx_unlock(&pr->pr_mtx); 3321191673Sjamie return (error); 3322185435Sbz} 3323185435Sbz#endif 3324185435Sbz 3325185435Sbz/* 3326188146Sjamie * Check if a jail supports the given address family. 3327188146Sjamie * 3328188146Sjamie * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT 3329188146Sjamie * if not. 3330188146Sjamie */ 3331188146Sjamieint 3332188146Sjamieprison_check_af(struct ucred *cred, int af) 3333188146Sjamie{ 3334192895Sjamie struct prison *pr; 3335188146Sjamie int error; 3336188146Sjamie 3337188146Sjamie KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3338188146Sjamie 3339192895Sjamie pr = cred->cr_prison; 3340194923Sjamie#ifdef VIMAGE 3341194915Sjamie /* Prisons with their own network stack are not limited. */ 3342200473Sbz if (prison_owns_vnet(cred)) 3343194915Sjamie return (0); 3344194923Sjamie#endif 3345194915Sjamie 3346188146Sjamie error = 0; 3347188146Sjamie switch (af) 3348188146Sjamie { 3349188146Sjamie#ifdef INET 3350188146Sjamie case AF_INET: 3351192895Sjamie if (pr->pr_flags & PR_IP4) 3352192895Sjamie { 3353192895Sjamie mtx_lock(&pr->pr_mtx); 3354192895Sjamie if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL) 3355192895Sjamie error = EAFNOSUPPORT; 3356192895Sjamie mtx_unlock(&pr->pr_mtx); 3357192895Sjamie } 3358188146Sjamie break; 3359188146Sjamie#endif 3360188146Sjamie#ifdef INET6 3361188146Sjamie case AF_INET6: 3362192895Sjamie if (pr->pr_flags & PR_IP6) 3363192895Sjamie { 3364192895Sjamie mtx_lock(&pr->pr_mtx); 3365192895Sjamie if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL) 3366192895Sjamie error = EAFNOSUPPORT; 3367192895Sjamie mtx_unlock(&pr->pr_mtx); 3368192895Sjamie } 3369188146Sjamie break; 3370188146Sjamie#endif 3371188146Sjamie case AF_LOCAL: 3372188146Sjamie case AF_ROUTE: 3373188146Sjamie break; 3374188146Sjamie default: 3375192895Sjamie if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF)) 3376188146Sjamie error = EAFNOSUPPORT; 3377188146Sjamie } 3378188146Sjamie return (error); 3379188146Sjamie} 3380188146Sjamie 3381188146Sjamie/* 3382185435Sbz * Check if given address belongs to the jail referenced by cred (wrapper to 3383185435Sbz * prison_check_ip[46]). 3384185435Sbz * 3385192895Sjamie * Returns 0 if jail doesn't restrict the address family or if address belongs 3386192895Sjamie * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if 3387192895Sjamie * the jail doesn't allow the address family. IPv4 Address passed in in NBO. 3388185435Sbz */ 3389185435Sbzint 339072786Srwatsonprison_if(struct ucred *cred, struct sockaddr *sa) 339146155Sphk{ 3392185435Sbz#ifdef INET 3393114168Smike struct sockaddr_in *sai; 3394185435Sbz#endif 3395185435Sbz#ifdef INET6 3396185435Sbz struct sockaddr_in6 *sai6; 3397185435Sbz#endif 3398188144Sjamie int error; 339946155Sphk 3400185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3401185435Sbz KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); 3402185435Sbz 3403200473Sbz#ifdef VIMAGE 3404200473Sbz if (prison_owns_vnet(cred)) 3405200473Sbz return (0); 3406200473Sbz#endif 3407200473Sbz 3408188144Sjamie error = 0; 3409188144Sjamie switch (sa->sa_family) 3410185435Sbz { 3411185435Sbz#ifdef INET 3412185435Sbz case AF_INET: 3413185435Sbz sai = (struct sockaddr_in *)sa; 3414188144Sjamie error = prison_check_ip4(cred, &sai->sin_addr); 3415185435Sbz break; 3416185435Sbz#endif 3417185435Sbz#ifdef INET6 3418185435Sbz case AF_INET6: 3419185435Sbz sai6 = (struct sockaddr_in6 *)sa; 3420188144Sjamie error = prison_check_ip6(cred, &sai6->sin6_addr); 3421185435Sbz break; 3422185435Sbz#endif 3423185435Sbz default: 3424192895Sjamie if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF)) 3425188144Sjamie error = EAFNOSUPPORT; 3426185435Sbz } 3427188144Sjamie return (error); 342846155Sphk} 342972786Srwatson 343072786Srwatson/* 343172786Srwatson * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. 343272786Srwatson */ 343372786Srwatsonint 3434114168Smikeprison_check(struct ucred *cred1, struct ucred *cred2) 343572786Srwatson{ 343672786Srwatson 3437192895Sjamie return ((cred1->cr_prison == cred2->cr_prison || 3438192895Sjamie prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH); 3439192895Sjamie} 344072786Srwatson 3441192895Sjamie/* 3442192895Sjamie * Return 1 if p2 is a child of p1, otherwise 0. 3443192895Sjamie */ 3444192895Sjamieint 3445192895Sjamieprison_ischild(struct prison *pr1, struct prison *pr2) 3446192895Sjamie{ 3447192895Sjamie 3448192895Sjamie for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent) 3449192895Sjamie if (pr1 == pr2) 3450192895Sjamie return (1); 345172786Srwatson return (0); 345272786Srwatson} 345372786Srwatson 345472786Srwatson/* 345572786Srwatson * Return 1 if the passed credential is in a jail, otherwise 0. 345672786Srwatson */ 345772786Srwatsonint 3458114168Smikejailed(struct ucred *cred) 345972786Srwatson{ 346072786Srwatson 3461192895Sjamie return (cred->cr_prison != &prison0); 346272786Srwatson} 346391384Srobert 346491384Srobert/* 3465200473Sbz * Return 1 if the passed credential is in a jail and that jail does not 3466200473Sbz * have its own virtual network stack, otherwise 0. 3467200473Sbz */ 3468200473Sbzint 3469200473Sbzjailed_without_vnet(struct ucred *cred) 3470200473Sbz{ 3471200473Sbz 3472200473Sbz if (!jailed(cred)) 3473200473Sbz return (0); 3474200473Sbz#ifdef VIMAGE 3475200473Sbz if (prison_owns_vnet(cred)) 3476200473Sbz return (0); 3477200473Sbz#endif 3478200473Sbz 3479200473Sbz return (1); 3480200473Sbz} 3481200473Sbz 3482200473Sbz/* 3483194090Sjamie * Return the correct hostname (domainname, et al) for the passed credential. 348491384Srobert */ 348591391Srobertvoid 3486114168Smikegetcredhostname(struct ucred *cred, char *buf, size_t size) 348791384Srobert{ 3488193066Sjamie struct prison *pr; 348991384Srobert 3490194090Sjamie /* 3491194090Sjamie * A NULL credential can be used to shortcut to the physical 3492194090Sjamie * system's hostname. 3493194090Sjamie */ 3494193066Sjamie pr = (cred != NULL) ? cred->cr_prison : &prison0; 3495193066Sjamie mtx_lock(&pr->pr_mtx); 3496194118Sjamie strlcpy(buf, pr->pr_hostname, size); 3497193066Sjamie mtx_unlock(&pr->pr_mtx); 349891384Srobert} 3499113275Smike 3500194090Sjamievoid 3501194090Sjamiegetcreddomainname(struct ucred *cred, char *buf, size_t size) 3502194090Sjamie{ 3503194090Sjamie 3504194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3505194118Sjamie strlcpy(buf, cred->cr_prison->pr_domainname, size); 3506194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3507194090Sjamie} 3508194090Sjamie 3509194090Sjamievoid 3510194090Sjamiegetcredhostuuid(struct ucred *cred, char *buf, size_t size) 3511194090Sjamie{ 3512194090Sjamie 3513194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3514194118Sjamie strlcpy(buf, cred->cr_prison->pr_hostuuid, size); 3515194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3516194090Sjamie} 3517194090Sjamie 3518194090Sjamievoid 3519194090Sjamiegetcredhostid(struct ucred *cred, unsigned long *hostid) 3520194090Sjamie{ 3521194090Sjamie 3522194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3523194090Sjamie *hostid = cred->cr_prison->pr_hostid; 3524194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3525194090Sjamie} 3526194090Sjamie 3527196176Sbz#ifdef VIMAGE 3528125804Srwatson/* 3529196176Sbz * Determine whether the prison represented by cred owns 3530196176Sbz * its vnet rather than having it inherited. 3531196176Sbz * 3532196176Sbz * Returns 1 in case the prison owns the vnet, 0 otherwise. 3533196176Sbz */ 3534196176Sbzint 3535196176Sbzprison_owns_vnet(struct ucred *cred) 3536196176Sbz{ 3537196176Sbz 3538196176Sbz /* 3539196176Sbz * vnets cannot be added/removed after jail creation, 3540196176Sbz * so no need to lock here. 3541196176Sbz */ 3542196176Sbz return (cred->cr_prison->pr_flags & PR_VNET ? 1 : 0); 3543196176Sbz} 3544196176Sbz#endif 3545196176Sbz 3546196176Sbz/* 3547147185Spjd * Determine whether the subject represented by cred can "see" 3548147185Spjd * status of a mount point. 3549147185Spjd * Returns: 0 for permitted, ENOENT otherwise. 3550147185Spjd * XXX: This function should be called cr_canseemount() and should be 3551147185Spjd * placed in kern_prot.c. 3552125804Srwatson */ 3553125804Srwatsonint 3554147185Spjdprison_canseemount(struct ucred *cred, struct mount *mp) 3555125804Srwatson{ 3556147185Spjd struct prison *pr; 3557147185Spjd struct statfs *sp; 3558147185Spjd size_t len; 3559125804Srwatson 3560192895Sjamie pr = cred->cr_prison; 3561192895Sjamie if (pr->pr_enforce_statfs == 0) 3562147185Spjd return (0); 3563147185Spjd if (pr->pr_root->v_mount == mp) 3564147185Spjd return (0); 3565192895Sjamie if (pr->pr_enforce_statfs == 2) 3566147185Spjd return (ENOENT); 3567147185Spjd /* 3568147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3569147185Spjd * all mount-points from inside a jail. 3570147185Spjd * This is ugly check, but this is the only situation when jail's 3571147185Spjd * directory ends with '/'. 3572147185Spjd */ 3573147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3574147185Spjd return (0); 3575147185Spjd len = strlen(pr->pr_path); 3576147185Spjd sp = &mp->mnt_stat; 3577147185Spjd if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) 3578147185Spjd return (ENOENT); 3579147185Spjd /* 3580147185Spjd * Be sure that we don't have situation where jail's root directory 3581147185Spjd * is "/some/path" and mount point is "/some/pathpath". 3582147185Spjd */ 3583147185Spjd if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') 3584147185Spjd return (ENOENT); 3585147185Spjd return (0); 3586147185Spjd} 3587147185Spjd 3588147185Spjdvoid 3589147185Spjdprison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) 3590147185Spjd{ 3591147185Spjd char jpath[MAXPATHLEN]; 3592147185Spjd struct prison *pr; 3593147185Spjd size_t len; 3594147185Spjd 3595192895Sjamie pr = cred->cr_prison; 3596192895Sjamie if (pr->pr_enforce_statfs == 0) 3597147185Spjd return; 3598147185Spjd if (prison_canseemount(cred, mp) != 0) { 3599147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3600147185Spjd strlcpy(sp->f_mntonname, "[restricted]", 3601147185Spjd sizeof(sp->f_mntonname)); 3602147185Spjd return; 3603125804Srwatson } 3604147185Spjd if (pr->pr_root->v_mount == mp) { 3605147185Spjd /* 3606147185Spjd * Clear current buffer data, so we are sure nothing from 3607147185Spjd * the valid path left there. 3608147185Spjd */ 3609147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3610147185Spjd *sp->f_mntonname = '/'; 3611147185Spjd return; 3612147185Spjd } 3613147185Spjd /* 3614147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3615147185Spjd * all mount-points from inside a jail. 3616147185Spjd */ 3617147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3618147185Spjd return; 3619147185Spjd len = strlen(pr->pr_path); 3620147185Spjd strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); 3621147185Spjd /* 3622147185Spjd * Clear current buffer data, so we are sure nothing from 3623147185Spjd * the valid path left there. 3624147185Spjd */ 3625147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3626147185Spjd if (*jpath == '\0') { 3627147185Spjd /* Should never happen. */ 3628147185Spjd *sp->f_mntonname = '/'; 3629147185Spjd } else { 3630147185Spjd strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); 3631147185Spjd } 3632125804Srwatson} 3633125804Srwatson 3634164032Srwatson/* 3635164032Srwatson * Check with permission for a specific privilege is granted within jail. We 3636164032Srwatson * have a specific list of accepted privileges; the rest are denied. 3637164032Srwatson */ 3638164032Srwatsonint 3639164032Srwatsonprison_priv_check(struct ucred *cred, int priv) 3640164032Srwatson{ 3641164032Srwatson 3642164032Srwatson if (!jailed(cred)) 3643164032Srwatson return (0); 3644164032Srwatson 3645194915Sjamie#ifdef VIMAGE 3646194915Sjamie /* 3647194915Sjamie * Privileges specific to prisons with a virtual network stack. 3648194915Sjamie * There might be a duplicate entry here in case the privilege 3649194915Sjamie * is only granted conditionally in the legacy jail case. 3650194915Sjamie */ 3651164032Srwatson switch (priv) { 3652194915Sjamie#ifdef notyet 3653194915Sjamie /* 3654194915Sjamie * NFS-specific privileges. 3655194915Sjamie */ 3656194915Sjamie case PRIV_NFS_DAEMON: 3657194915Sjamie case PRIV_NFS_LOCKD: 3658194915Sjamie#endif 3659194915Sjamie /* 3660194915Sjamie * Network stack privileges. 3661194915Sjamie */ 3662194915Sjamie case PRIV_NET_BRIDGE: 3663194915Sjamie case PRIV_NET_GRE: 3664194915Sjamie case PRIV_NET_BPF: 3665194915Sjamie case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */ 3666194915Sjamie case PRIV_NET_ROUTE: 3667194915Sjamie case PRIV_NET_TAP: 3668194915Sjamie case PRIV_NET_SETIFMTU: 3669194915Sjamie case PRIV_NET_SETIFFLAGS: 3670194915Sjamie case PRIV_NET_SETIFCAP: 3671203052Sdelphij case PRIV_NET_SETIFDESCR: 3672194915Sjamie case PRIV_NET_SETIFNAME : 3673194915Sjamie case PRIV_NET_SETIFMETRIC: 3674194915Sjamie case PRIV_NET_SETIFPHYS: 3675194915Sjamie case PRIV_NET_SETIFMAC: 3676194915Sjamie case PRIV_NET_ADDMULTI: 3677194915Sjamie case PRIV_NET_DELMULTI: 3678194915Sjamie case PRIV_NET_HWIOCTL: 3679194915Sjamie case PRIV_NET_SETLLADDR: 3680194915Sjamie case PRIV_NET_ADDIFGROUP: 3681194915Sjamie case PRIV_NET_DELIFGROUP: 3682194915Sjamie case PRIV_NET_IFCREATE: 3683194915Sjamie case PRIV_NET_IFDESTROY: 3684194915Sjamie case PRIV_NET_ADDIFADDR: 3685194915Sjamie case PRIV_NET_DELIFADDR: 3686194915Sjamie case PRIV_NET_LAGG: 3687194915Sjamie case PRIV_NET_GIF: 3688194915Sjamie case PRIV_NET_SETIFVNET: 3689223735Sbz case PRIV_NET_SETIFFIB: 3690164032Srwatson 3691164032Srwatson /* 3692194915Sjamie * 802.11-related privileges. 3693194915Sjamie */ 3694194915Sjamie case PRIV_NET80211_GETKEY: 3695194915Sjamie#ifdef notyet 3696194915Sjamie case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */ 3697194915Sjamie#endif 3698194915Sjamie 3699194915Sjamie#ifdef notyet 3700194915Sjamie /* 3701194915Sjamie * AppleTalk privileges. 3702194915Sjamie */ 3703194915Sjamie case PRIV_NETATALK_RESERVEDPORT: 3704194915Sjamie 3705194915Sjamie /* 3706194915Sjamie * ATM privileges. 3707194915Sjamie */ 3708194915Sjamie case PRIV_NETATM_CFG: 3709194915Sjamie case PRIV_NETATM_ADD: 3710194915Sjamie case PRIV_NETATM_DEL: 3711194915Sjamie case PRIV_NETATM_SET: 3712194915Sjamie 3713194915Sjamie /* 3714194915Sjamie * Bluetooth privileges. 3715194915Sjamie */ 3716194915Sjamie case PRIV_NETBLUETOOTH_RAW: 3717194915Sjamie#endif 3718194915Sjamie 3719194915Sjamie /* 3720194915Sjamie * Netgraph and netgraph module privileges. 3721194915Sjamie */ 3722194915Sjamie case PRIV_NETGRAPH_CONTROL: 3723194915Sjamie#ifdef notyet 3724194915Sjamie case PRIV_NETGRAPH_TTY: 3725194915Sjamie#endif 3726194915Sjamie 3727194915Sjamie /* 3728194915Sjamie * IPv4 and IPv6 privileges. 3729194915Sjamie */ 3730194915Sjamie case PRIV_NETINET_IPFW: 3731194915Sjamie case PRIV_NETINET_DIVERT: 3732194915Sjamie case PRIV_NETINET_PF: 3733194915Sjamie case PRIV_NETINET_DUMMYNET: 3734194915Sjamie case PRIV_NETINET_CARP: 3735194915Sjamie case PRIV_NETINET_MROUTE: 3736194915Sjamie case PRIV_NETINET_RAW: 3737194915Sjamie case PRIV_NETINET_ADDRCTRL6: 3738194915Sjamie case PRIV_NETINET_ND6: 3739194915Sjamie case PRIV_NETINET_SCOPE6: 3740194915Sjamie case PRIV_NETINET_ALIFETIME6: 3741194915Sjamie case PRIV_NETINET_IPSEC: 3742194915Sjamie case PRIV_NETINET_BINDANY: 3743194915Sjamie 3744194915Sjamie#ifdef notyet 3745194915Sjamie /* 3746194915Sjamie * IPX/SPX privileges. 3747194915Sjamie */ 3748194915Sjamie case PRIV_NETIPX_RESERVEDPORT: 3749194915Sjamie case PRIV_NETIPX_RAW: 3750194915Sjamie 3751194915Sjamie /* 3752194915Sjamie * NCP privileges. 3753194915Sjamie */ 3754194915Sjamie case PRIV_NETNCP: 3755194915Sjamie 3756194915Sjamie /* 3757194915Sjamie * SMB privileges. 3758194915Sjamie */ 3759194915Sjamie case PRIV_NETSMB: 3760194915Sjamie#endif 3761194915Sjamie 3762194915Sjamie /* 3763194915Sjamie * No default: or deny here. 3764194915Sjamie * In case of no permit fall through to next switch(). 3765194915Sjamie */ 3766194915Sjamie if (cred->cr_prison->pr_flags & PR_VNET) 3767194915Sjamie return (0); 3768194915Sjamie } 3769194915Sjamie#endif /* VIMAGE */ 3770194915Sjamie 3771194915Sjamie switch (priv) { 3772194915Sjamie 3773194915Sjamie /* 3774164032Srwatson * Allow ktrace privileges for root in jail. 3775164032Srwatson */ 3776164032Srwatson case PRIV_KTRACE: 3777164032Srwatson 3778166827Srwatson#if 0 3779164032Srwatson /* 3780164032Srwatson * Allow jailed processes to configure audit identity and 3781164032Srwatson * submit audit records (login, etc). In the future we may 3782164032Srwatson * want to further refine the relationship between audit and 3783164032Srwatson * jail. 3784164032Srwatson */ 3785164032Srwatson case PRIV_AUDIT_GETAUDIT: 3786164032Srwatson case PRIV_AUDIT_SETAUDIT: 3787164032Srwatson case PRIV_AUDIT_SUBMIT: 3788166827Srwatson#endif 3789164032Srwatson 3790164032Srwatson /* 3791164032Srwatson * Allow jailed processes to manipulate process UNIX 3792164032Srwatson * credentials in any way they see fit. 3793164032Srwatson */ 3794164032Srwatson case PRIV_CRED_SETUID: 3795164032Srwatson case PRIV_CRED_SETEUID: 3796164032Srwatson case PRIV_CRED_SETGID: 3797164032Srwatson case PRIV_CRED_SETEGID: 3798164032Srwatson case PRIV_CRED_SETGROUPS: 3799164032Srwatson case PRIV_CRED_SETREUID: 3800164032Srwatson case PRIV_CRED_SETREGID: 3801164032Srwatson case PRIV_CRED_SETRESUID: 3802164032Srwatson case PRIV_CRED_SETRESGID: 3803164032Srwatson 3804164032Srwatson /* 3805164032Srwatson * Jail implements visibility constraints already, so allow 3806164032Srwatson * jailed root to override uid/gid-based constraints. 3807164032Srwatson */ 3808164032Srwatson case PRIV_SEEOTHERGIDS: 3809164032Srwatson case PRIV_SEEOTHERUIDS: 3810164032Srwatson 3811164032Srwatson /* 3812164032Srwatson * Jail implements inter-process debugging limits already, so 3813164032Srwatson * allow jailed root various debugging privileges. 3814164032Srwatson */ 3815164032Srwatson case PRIV_DEBUG_DIFFCRED: 3816164032Srwatson case PRIV_DEBUG_SUGID: 3817164032Srwatson case PRIV_DEBUG_UNPRIV: 3818164032Srwatson 3819164032Srwatson /* 3820164032Srwatson * Allow jail to set various resource limits and login 3821164032Srwatson * properties, and for now, exceed process resource limits. 3822164032Srwatson */ 3823164032Srwatson case PRIV_PROC_LIMIT: 3824164032Srwatson case PRIV_PROC_SETLOGIN: 3825164032Srwatson case PRIV_PROC_SETRLIMIT: 3826164032Srwatson 3827164032Srwatson /* 3828164032Srwatson * System V and POSIX IPC privileges are granted in jail. 3829164032Srwatson */ 3830164032Srwatson case PRIV_IPC_READ: 3831164032Srwatson case PRIV_IPC_WRITE: 3832164032Srwatson case PRIV_IPC_ADMIN: 3833164032Srwatson case PRIV_IPC_MSGSIZE: 3834164032Srwatson case PRIV_MQ_ADMIN: 3835164032Srwatson 3836164032Srwatson /* 3837192895Sjamie * Jail operations within a jail work on child jails. 3838192895Sjamie */ 3839192895Sjamie case PRIV_JAIL_ATTACH: 3840192895Sjamie case PRIV_JAIL_SET: 3841192895Sjamie case PRIV_JAIL_REMOVE: 3842192895Sjamie 3843192895Sjamie /* 3844164032Srwatson * Jail implements its own inter-process limits, so allow 3845164032Srwatson * root processes in jail to change scheduling on other 3846164032Srwatson * processes in the same jail. Likewise for signalling. 3847164032Srwatson */ 3848164032Srwatson case PRIV_SCHED_DIFFCRED: 3849185435Sbz case PRIV_SCHED_CPUSET: 3850164032Srwatson case PRIV_SIGNAL_DIFFCRED: 3851164032Srwatson case PRIV_SIGNAL_SUGID: 3852164032Srwatson 3853164032Srwatson /* 3854164032Srwatson * Allow jailed processes to write to sysctls marked as jail 3855164032Srwatson * writable. 3856164032Srwatson */ 3857164032Srwatson case PRIV_SYSCTL_WRITEJAIL: 3858164032Srwatson 3859164032Srwatson /* 3860164032Srwatson * Allow root in jail to manage a variety of quota 3861166831Srwatson * properties. These should likely be conditional on a 3862166831Srwatson * configuration option. 3863164032Srwatson */ 3864166832Srwatson case PRIV_VFS_GETQUOTA: 3865166832Srwatson case PRIV_VFS_SETQUOTA: 3866164032Srwatson 3867164032Srwatson /* 3868164032Srwatson * Since Jail relies on chroot() to implement file system 3869164032Srwatson * protections, grant many VFS privileges to root in jail. 3870164032Srwatson * Be careful to exclude mount-related and NFS-related 3871164032Srwatson * privileges. 3872164032Srwatson */ 3873164032Srwatson case PRIV_VFS_READ: 3874164032Srwatson case PRIV_VFS_WRITE: 3875164032Srwatson case PRIV_VFS_ADMIN: 3876164032Srwatson case PRIV_VFS_EXEC: 3877164032Srwatson case PRIV_VFS_LOOKUP: 3878164032Srwatson case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ 3879164032Srwatson case PRIV_VFS_CHFLAGS_DEV: 3880164032Srwatson case PRIV_VFS_CHOWN: 3881164032Srwatson case PRIV_VFS_CHROOT: 3882167152Spjd case PRIV_VFS_RETAINSUGID: 3883164032Srwatson case PRIV_VFS_FCHROOT: 3884164032Srwatson case PRIV_VFS_LINK: 3885164032Srwatson case PRIV_VFS_SETGID: 3886172860Srwatson case PRIV_VFS_STAT: 3887164032Srwatson case PRIV_VFS_STICKYFILE: 3888164032Srwatson return (0); 3889164032Srwatson 3890164032Srwatson /* 3891164032Srwatson * Depending on the global setting, allow privilege of 3892164032Srwatson * setting system flags. 3893164032Srwatson */ 3894164032Srwatson case PRIV_VFS_SYSFLAGS: 3895192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS) 3896164032Srwatson return (0); 3897164032Srwatson else 3898164032Srwatson return (EPERM); 3899164032Srwatson 3900164032Srwatson /* 3901168396Spjd * Depending on the global setting, allow privilege of 3902168396Spjd * mounting/unmounting file systems. 3903168396Spjd */ 3904168396Spjd case PRIV_VFS_MOUNT: 3905168396Spjd case PRIV_VFS_UNMOUNT: 3906168396Spjd case PRIV_VFS_MOUNT_NONUSER: 3907168699Spjd case PRIV_VFS_MOUNT_OWNER: 3908224615Smm if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT && 3909224615Smm cred->cr_prison->pr_enforce_statfs < 2) 3910168396Spjd return (0); 3911168396Spjd else 3912168396Spjd return (EPERM); 3913168396Spjd 3914168396Spjd /* 3915168591Srwatson * Allow jailed root to bind reserved ports and reuse in-use 3916168591Srwatson * ports. 3917164032Srwatson */ 3918164032Srwatson case PRIV_NETINET_RESERVEDPORT: 3919168591Srwatson case PRIV_NETINET_REUSEPORT: 3920164032Srwatson return (0); 3921164032Srwatson 3922164032Srwatson /* 3923175630Sbz * Allow jailed root to set certian IPv4/6 (option) headers. 3924175630Sbz */ 3925175630Sbz case PRIV_NETINET_SETHDROPTS: 3926175630Sbz return (0); 3927175630Sbz 3928175630Sbz /* 3929164032Srwatson * Conditionally allow creating raw sockets in jail. 3930164032Srwatson */ 3931164032Srwatson case PRIV_NETINET_RAW: 3932192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS) 3933164032Srwatson return (0); 3934164032Srwatson else 3935164032Srwatson return (EPERM); 3936164032Srwatson 3937164032Srwatson /* 3938164032Srwatson * Since jail implements its own visibility limits on netstat 3939164032Srwatson * sysctls, allow getcred. This allows identd to work in 3940164032Srwatson * jail. 3941164032Srwatson */ 3942164032Srwatson case PRIV_NETINET_GETCRED: 3943164032Srwatson return (0); 3944164032Srwatson 3945219304Strasz /* 3946219304Strasz * Allow jailed root to set loginclass. 3947219304Strasz */ 3948219304Strasz case PRIV_PROC_SETLOGINCLASS: 3949219304Strasz return (0); 3950219304Strasz 3951164032Srwatson default: 3952164032Srwatson /* 3953164032Srwatson * In all remaining cases, deny the privilege request. This 3954164032Srwatson * includes almost all network privileges, many system 3955164032Srwatson * configuration privileges. 3956164032Srwatson */ 3957164032Srwatson return (EPERM); 3958164032Srwatson } 3959164032Srwatson} 3960164032Srwatson 3961192895Sjamie/* 3962192895Sjamie * Return the part of pr2's name that is relative to pr1, or the whole name 3963192895Sjamie * if it does not directly follow. 3964192895Sjamie */ 3965192895Sjamie 3966192895Sjamiechar * 3967192895Sjamieprison_name(struct prison *pr1, struct prison *pr2) 3968192895Sjamie{ 3969192895Sjamie char *name; 3970192895Sjamie 3971192895Sjamie /* Jails see themselves as "0" (if they see themselves at all). */ 3972192895Sjamie if (pr1 == pr2) 3973192895Sjamie return "0"; 3974192895Sjamie name = pr2->pr_name; 3975192895Sjamie if (prison_ischild(pr1, pr2)) { 3976192895Sjamie /* 3977192895Sjamie * pr1 isn't locked (and allprison_lock may not be either) 3978192895Sjamie * so its length can't be counted on. But the number of dots 3979192895Sjamie * can be counted on - and counted. 3980192895Sjamie */ 3981192895Sjamie for (; pr1 != &prison0; pr1 = pr1->pr_parent) 3982192895Sjamie name = strchr(name, '.') + 1; 3983192895Sjamie } 3984192895Sjamie return (name); 3985192895Sjamie} 3986192895Sjamie 3987192895Sjamie/* 3988192895Sjamie * Return the part of pr2's path that is relative to pr1, or the whole path 3989192895Sjamie * if it does not directly follow. 3990192895Sjamie */ 3991192895Sjamiestatic char * 3992192895Sjamieprison_path(struct prison *pr1, struct prison *pr2) 3993192895Sjamie{ 3994192895Sjamie char *path1, *path2; 3995192895Sjamie int len1; 3996192895Sjamie 3997192895Sjamie path1 = pr1->pr_path; 3998192895Sjamie path2 = pr2->pr_path; 3999192895Sjamie if (!strcmp(path1, "/")) 4000192895Sjamie return (path2); 4001192895Sjamie len1 = strlen(path1); 4002192895Sjamie if (strncmp(path1, path2, len1)) 4003192895Sjamie return (path2); 4004192895Sjamie if (path2[len1] == '\0') 4005192895Sjamie return "/"; 4006192895Sjamie if (path2[len1] == '/') 4007192895Sjamie return (path2 + len1); 4008192895Sjamie return (path2); 4009192895Sjamie} 4010192895Sjamie 4011192895Sjamie 4012192895Sjamie/* 4013192895Sjamie * Jail-related sysctls. 4014192895Sjamie */ 4015227309Sedstatic SYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, 4016192895Sjamie "Jails"); 4017192895Sjamie 4018113275Smikestatic int 4019113275Smikesysctl_jail_list(SYSCTL_HANDLER_ARGS) 4020113275Smike{ 4021191673Sjamie struct xprison *xp; 4022192895Sjamie struct prison *pr, *cpr; 4023191673Sjamie#ifdef INET 4024191673Sjamie struct in_addr *ip4 = NULL; 4025191673Sjamie int ip4s = 0; 4026191673Sjamie#endif 4027191673Sjamie#ifdef INET6 4028208803Scperciva struct in6_addr *ip6 = NULL; 4029191673Sjamie int ip6s = 0; 4030191673Sjamie#endif 4031192895Sjamie int descend, error; 4032113275Smike 4033191673Sjamie xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); 4034192895Sjamie pr = req->td->td_ucred->cr_prison; 4035191673Sjamie error = 0; 4036168401Spjd sx_slock(&allprison_lock); 4037192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 4038192895Sjamie#if defined(INET) || defined(INET6) 4039191673Sjamie again: 4040192895Sjamie#endif 4041192895Sjamie mtx_lock(&cpr->pr_mtx); 4042185435Sbz#ifdef INET 4043192895Sjamie if (cpr->pr_ip4s > 0) { 4044192895Sjamie if (ip4s < cpr->pr_ip4s) { 4045192895Sjamie ip4s = cpr->pr_ip4s; 4046192895Sjamie mtx_unlock(&cpr->pr_mtx); 4047191673Sjamie ip4 = realloc(ip4, ip4s * 4048191673Sjamie sizeof(struct in_addr), M_TEMP, M_WAITOK); 4049191673Sjamie goto again; 4050191673Sjamie } 4051192895Sjamie bcopy(cpr->pr_ip4, ip4, 4052192895Sjamie cpr->pr_ip4s * sizeof(struct in_addr)); 4053191673Sjamie } 4054185435Sbz#endif 4055185435Sbz#ifdef INET6 4056192895Sjamie if (cpr->pr_ip6s > 0) { 4057192895Sjamie if (ip6s < cpr->pr_ip6s) { 4058192895Sjamie ip6s = cpr->pr_ip6s; 4059192895Sjamie mtx_unlock(&cpr->pr_mtx); 4060191673Sjamie ip6 = realloc(ip6, ip6s * 4061191673Sjamie sizeof(struct in6_addr), M_TEMP, M_WAITOK); 4062191673Sjamie goto again; 4063191673Sjamie } 4064192895Sjamie bcopy(cpr->pr_ip6, ip6, 4065192895Sjamie cpr->pr_ip6s * sizeof(struct in6_addr)); 4066191673Sjamie } 4067185435Sbz#endif 4068192895Sjamie if (cpr->pr_ref == 0) { 4069192895Sjamie mtx_unlock(&cpr->pr_mtx); 4070191673Sjamie continue; 4071191673Sjamie } 4072191673Sjamie bzero(xp, sizeof(*xp)); 4073113275Smike xp->pr_version = XPRISON_VERSION; 4074192895Sjamie xp->pr_id = cpr->pr_id; 4075192895Sjamie xp->pr_state = cpr->pr_uref > 0 4076191673Sjamie ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; 4077192895Sjamie strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path)); 4078194118Sjamie strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host)); 4079192895Sjamie strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name)); 4080185435Sbz#ifdef INET 4081192895Sjamie xp->pr_ip4s = cpr->pr_ip4s; 4082185435Sbz#endif 4083185435Sbz#ifdef INET6 4084192895Sjamie xp->pr_ip6s = cpr->pr_ip6s; 4085185435Sbz#endif 4086192895Sjamie mtx_unlock(&cpr->pr_mtx); 4087191673Sjamie error = SYSCTL_OUT(req, xp, sizeof(*xp)); 4088191673Sjamie if (error) 4089191673Sjamie break; 4090185435Sbz#ifdef INET 4091191673Sjamie if (xp->pr_ip4s > 0) { 4092191673Sjamie error = SYSCTL_OUT(req, ip4, 4093191673Sjamie xp->pr_ip4s * sizeof(struct in_addr)); 4094191673Sjamie if (error) 4095191673Sjamie break; 4096185435Sbz } 4097185435Sbz#endif 4098185435Sbz#ifdef INET6 4099191673Sjamie if (xp->pr_ip6s > 0) { 4100191673Sjamie error = SYSCTL_OUT(req, ip6, 4101191673Sjamie xp->pr_ip6s * sizeof(struct in6_addr)); 4102191673Sjamie if (error) 4103191673Sjamie break; 4104185435Sbz } 4105185435Sbz#endif 4106113275Smike } 4107168401Spjd sx_sunlock(&allprison_lock); 4108191673Sjamie free(xp, M_TEMP); 4109191673Sjamie#ifdef INET 4110191673Sjamie free(ip4, M_TEMP); 4111191673Sjamie#endif 4112191673Sjamie#ifdef INET6 4113191673Sjamie free(ip6, M_TEMP); 4114191673Sjamie#endif 4115167354Spjd return (error); 4116113275Smike} 4117113275Smike 4118187864SedSYSCTL_OID(_security_jail, OID_AUTO, list, 4119187864Sed CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4120187864Sed sysctl_jail_list, "S", "List of active jails"); 4121126004Spjd 4122126004Spjdstatic int 4123126004Spjdsysctl_jail_jailed(SYSCTL_HANDLER_ARGS) 4124126004Spjd{ 4125126004Spjd int error, injail; 4126126004Spjd 4127126004Spjd injail = jailed(req->td->td_ucred); 4128126004Spjd error = SYSCTL_OUT(req, &injail, sizeof(injail)); 4129126004Spjd 4130126004Spjd return (error); 4131126004Spjd} 4132192895Sjamie 4133187864SedSYSCTL_PROC(_security_jail, OID_AUTO, jailed, 4134187864Sed CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4135187864Sed sysctl_jail_jailed, "I", "Process in jail?"); 4136185435Sbz 4137192895Sjamie#if defined(INET) || defined(INET6) 4138193865SjamieSYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, 4139192895Sjamie &jail_max_af_ips, 0, 4140192895Sjamie "Number of IP addresses a jail may have at most per address family"); 4141192895Sjamie#endif 4142192895Sjamie 4143192895Sjamie/* 4144192895Sjamie * Default parameters for jail(2) compatability. For historical reasons, 4145192895Sjamie * the sysctl names have varying similarity to the parameter names. Prisons 4146192895Sjamie * just see their own parameters, and can't change them. 4147192895Sjamie */ 4148192895Sjamiestatic int 4149192895Sjamiesysctl_jail_default_allow(SYSCTL_HANDLER_ARGS) 4150192895Sjamie{ 4151192895Sjamie struct prison *pr; 4152192895Sjamie int allow, error, i; 4153192895Sjamie 4154192895Sjamie pr = req->td->td_ucred->cr_prison; 4155192895Sjamie allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow; 4156192895Sjamie 4157192895Sjamie /* Get the current flag value, and convert it to a boolean. */ 4158192895Sjamie i = (allow & arg2) ? 1 : 0; 4159192895Sjamie if (arg1 != NULL) 4160192895Sjamie i = !i; 4161192895Sjamie error = sysctl_handle_int(oidp, &i, 0, req); 4162192895Sjamie if (error || !req->newptr) 4163192895Sjamie return (error); 4164192895Sjamie i = i ? arg2 : 0; 4165192895Sjamie if (arg1 != NULL) 4166192895Sjamie i ^= arg2; 4167192895Sjamie /* 4168192895Sjamie * The sysctls don't have CTLFLAGS_PRISON, so assume prison0 4169192895Sjamie * for writing. 4170192895Sjamie */ 4171192895Sjamie mtx_lock(&prison0.pr_mtx); 4172192895Sjamie jail_default_allow = (jail_default_allow & ~arg2) | i; 4173192895Sjamie mtx_unlock(&prison0.pr_mtx); 4174192895Sjamie return (0); 4175192895Sjamie} 4176192895Sjamie 4177192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed, 4178192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4179192895Sjamie NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I", 4180192895Sjamie "Processes in jail can set their hostnames"); 4181192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only, 4182192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4183192895Sjamie (void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I", 4184192895Sjamie "Processes in jail are limited to creating UNIX/IP/route sockets only"); 4185192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed, 4186192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4187192895Sjamie NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I", 4188192895Sjamie "Processes in jail can use System V IPC primitives"); 4189192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets, 4190192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4191192895Sjamie NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I", 4192192895Sjamie "Prison root can create raw sockets"); 4193192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed, 4194192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4195192895Sjamie NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I", 4196192895Sjamie "Processes in jail can alter system file flags"); 4197192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed, 4198192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4199192895Sjamie NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I", 4200192895Sjamie "Processes in jail can mount/unmount jail-friendly file systems"); 4201232059SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_devfs_allowed, 4202232059Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4203232059Smm NULL, PR_ALLOW_MOUNT_DEVFS, sysctl_jail_default_allow, "I", 4204232186Smm "Processes in jail can mount the devfs file system"); 4205232059SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_nullfs_allowed, 4206232059Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4207232059Smm NULL, PR_ALLOW_MOUNT_NULLFS, sysctl_jail_default_allow, "I", 4208232186Smm "Processes in jail can mount the nullfs file system"); 4209232186SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_zfs_allowed, 4210232186Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4211232186Smm NULL, PR_ALLOW_MOUNT_ZFS, sysctl_jail_default_allow, "I", 4212232186Smm "Processes in jail can mount the zfs file system"); 4213192895Sjamie 4214192895Sjamiestatic int 4215192895Sjamiesysctl_jail_default_level(SYSCTL_HANDLER_ARGS) 4216192895Sjamie{ 4217192895Sjamie struct prison *pr; 4218192895Sjamie int level, error; 4219192895Sjamie 4220192895Sjamie pr = req->td->td_ucred->cr_prison; 4221192895Sjamie level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2); 4222192895Sjamie error = sysctl_handle_int(oidp, &level, 0, req); 4223192895Sjamie if (error || !req->newptr) 4224192895Sjamie return (error); 4225192895Sjamie *(int *)arg1 = level; 4226192895Sjamie return (0); 4227192895Sjamie} 4228192895Sjamie 4229192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs, 4230192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4231192895Sjamie &jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs), 4232192895Sjamie sysctl_jail_default_level, "I", 4233192895Sjamie "Processes in jail cannot see all mounted file systems"); 4234192895Sjamie 4235231267SmmSYSCTL_PROC(_security_jail, OID_AUTO, devfs_ruleset, 4236231267Smm CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, 4237231267Smm &jail_default_devfs_rsnum, offsetof(struct prison, pr_devfs_rsnum), 4238231267Smm sysctl_jail_default_level, "I", 4239231267Smm "Ruleset for the devfs filesystem in jail"); 4240231267Smm 4241192895Sjamie/* 4242192895Sjamie * Nodes to describe jail parameters. Maximum length of string parameters 4243192895Sjamie * is returned in the string itself, and the other parameters exist merely 4244192895Sjamie * to make themselves and their types known. 4245192895Sjamie */ 4246192895SjamieSYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, 4247192895Sjamie "Jail parameters"); 4248192895Sjamie 4249192895Sjamieint 4250192895Sjamiesysctl_jail_param(SYSCTL_HANDLER_ARGS) 4251192895Sjamie{ 4252192895Sjamie int i; 4253192895Sjamie long l; 4254192895Sjamie size_t s; 4255192895Sjamie char numbuf[12]; 4256192895Sjamie 4257192895Sjamie switch (oidp->oid_kind & CTLTYPE) 4258192895Sjamie { 4259192895Sjamie case CTLTYPE_LONG: 4260192895Sjamie case CTLTYPE_ULONG: 4261192895Sjamie l = 0; 4262192895Sjamie#ifdef SCTL_MASK32 4263192895Sjamie if (!(req->flags & SCTL_MASK32)) 4264192895Sjamie#endif 4265192895Sjamie return (SYSCTL_OUT(req, &l, sizeof(l))); 4266192895Sjamie case CTLTYPE_INT: 4267192895Sjamie case CTLTYPE_UINT: 4268192895Sjamie i = 0; 4269192895Sjamie return (SYSCTL_OUT(req, &i, sizeof(i))); 4270192895Sjamie case CTLTYPE_STRING: 4271219819Sjeff snprintf(numbuf, sizeof(numbuf), "%jd", (intmax_t)arg2); 4272192895Sjamie return 4273192895Sjamie (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); 4274192895Sjamie case CTLTYPE_STRUCT: 4275192895Sjamie s = (size_t)arg2; 4276192895Sjamie return (SYSCTL_OUT(req, &s, sizeof(s))); 4277192895Sjamie } 4278192895Sjamie return (0); 4279192895Sjamie} 4280192895Sjamie 4281192895SjamieSYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID"); 4282192895SjamieSYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID"); 4283192895SjamieSYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); 4284192895SjamieSYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path"); 4285192895SjamieSYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, 4286192895Sjamie "I", "Jail secure level"); 4287192895SjamieSYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW, 4288192895Sjamie "I", "Jail cannot see all mounted file systems"); 4289231267SmmSYSCTL_JAIL_PARAM(, devfs_ruleset, CTLTYPE_INT | CTLFLAG_RW, 4290231267Smm "I", "Ruleset for in-jail devfs mounts"); 4291192895SjamieSYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, 4292192895Sjamie "B", "Jail persistence"); 4293194251Sjamie#ifdef VIMAGE 4294194251SjamieSYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN, 4295195870Sjamie "E,jailsys", "Virtual network stack"); 4296194251Sjamie#endif 4297192895SjamieSYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, 4298192895Sjamie "B", "Jail is in the process of shutting down"); 4299192895Sjamie 4300194762SjamieSYSCTL_JAIL_PARAM_NODE(children, "Number of child jails"); 4301194762SjamieSYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD, 4302194762Sjamie "I", "Current number of child jails"); 4303194762SjamieSYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW, 4304194762Sjamie "I", "Maximum number of child jails"); 4305194762Sjamie 4306195870SjamieSYSCTL_JAIL_PARAM_SYS_NODE(host, CTLFLAG_RW, "Jail host info"); 4307192895SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, 4308192895Sjamie "Jail hostname"); 4309193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN, 4310193066Sjamie "Jail NIS domainname"); 4311193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN, 4312193066Sjamie "Jail host UUID"); 4313193066SjamieSYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW, 4314193066Sjamie "LU", "Jail host ID"); 4315192895Sjamie 4316192895SjamieSYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset"); 4317192895SjamieSYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); 4318192895Sjamie 4319192895Sjamie#ifdef INET 4320195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip4, CTLFLAG_RDTUN, 4321195974Sjamie "Jail IPv4 address virtualization"); 4322192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), 4323192895Sjamie "S,in_addr,a", "Jail IPv4 addresses"); 4324202468SbzSYSCTL_JAIL_PARAM(_ip4, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4325202468Sbz "B", "Do (not) use IPv4 source address selection rather than the " 4326202468Sbz "primary jail IPv4 address."); 4327192895Sjamie#endif 4328192895Sjamie#ifdef INET6 4329195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip6, CTLFLAG_RDTUN, 4330195974Sjamie "Jail IPv6 address virtualization"); 4331192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), 4332192895Sjamie "S,in6_addr,a", "Jail IPv6 addresses"); 4333202468SbzSYSCTL_JAIL_PARAM(_ip6, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4334202468Sbz "B", "Do (not) use IPv6 source address selection rather than the " 4335202468Sbz "primary jail IPv6 address."); 4336192895Sjamie#endif 4337192895Sjamie 4338192895SjamieSYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags"); 4339192895SjamieSYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW, 4340192895Sjamie "B", "Jail may set hostname"); 4341192895SjamieSYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW, 4342192895Sjamie "B", "Jail may use SYSV IPC"); 4343192895SjamieSYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW, 4344192895Sjamie "B", "Jail may create raw sockets"); 4345192895SjamieSYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW, 4346192895Sjamie "B", "Jail may alter system file flags"); 4347192895SjamieSYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW, 4348192895Sjamie "B", "Jail may set file quotas"); 4349192895SjamieSYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW, 4350192895Sjamie "B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route"); 4351192895Sjamie 4352232059SmmSYSCTL_JAIL_PARAM_SUBNODE(allow, mount, "Jail mount/unmount permission flags"); 4353232059SmmSYSCTL_JAIL_PARAM(_allow_mount, , CTLTYPE_INT | CTLFLAG_RW, 4354232059Smm "B", "Jail may mount/unmount jail-friendly file systems in general"); 4355232059SmmSYSCTL_JAIL_PARAM(_allow_mount, devfs, CTLTYPE_INT | CTLFLAG_RW, 4356232186Smm "B", "Jail may mount the devfs file system"); 4357232059SmmSYSCTL_JAIL_PARAM(_allow_mount, nullfs, CTLTYPE_INT | CTLFLAG_RW, 4358232186Smm "B", "Jail may mount the nullfs file system"); 4359232186SmmSYSCTL_JAIL_PARAM(_allow_mount, zfs, CTLTYPE_INT | CTLFLAG_RW, 4360232186Smm "B", "Jail may mount the zfs file system"); 4361232059Smm 4362220137Straszvoid 4363220137Straszprison_racct_foreach(void (*callback)(struct racct *racct, 4364220137Strasz void *arg2, void *arg3), void *arg2, void *arg3) 4365220137Strasz{ 4366221362Strasz struct prison_racct *prr; 4367192895Sjamie 4368220137Strasz sx_slock(&allprison_lock); 4369221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) 4370221362Strasz (callback)(prr->prr_racct, arg2, arg3); 4371220137Strasz sx_sunlock(&allprison_lock); 4372220137Strasz} 4373220137Strasz 4374221362Straszstatic struct prison_racct * 4375221362Straszprison_racct_find_locked(const char *name) 4376221362Strasz{ 4377221362Strasz struct prison_racct *prr; 4378221362Strasz 4379221362Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4380221362Strasz 4381221362Strasz if (name[0] == '\0' || strlen(name) >= MAXHOSTNAMELEN) 4382221362Strasz return (NULL); 4383221362Strasz 4384221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) { 4385221362Strasz if (strcmp(name, prr->prr_name) != 0) 4386221362Strasz continue; 4387221362Strasz 4388221362Strasz /* Found prison_racct with a matching name? */ 4389221362Strasz prison_racct_hold(prr); 4390221362Strasz return (prr); 4391221362Strasz } 4392221362Strasz 4393221362Strasz /* Add new prison_racct. */ 4394221362Strasz prr = malloc(sizeof(*prr), M_PRISON_RACCT, M_ZERO | M_WAITOK); 4395221362Strasz racct_create(&prr->prr_racct); 4396221362Strasz 4397221362Strasz strcpy(prr->prr_name, name); 4398221362Strasz refcount_init(&prr->prr_refcount, 1); 4399221362Strasz LIST_INSERT_HEAD(&allprison_racct, prr, prr_next); 4400221362Strasz 4401221362Strasz return (prr); 4402221362Strasz} 4403221362Strasz 4404221362Straszstruct prison_racct * 4405221362Straszprison_racct_find(const char *name) 4406221362Strasz{ 4407221362Strasz struct prison_racct *prr; 4408221362Strasz 4409221362Strasz sx_xlock(&allprison_lock); 4410221362Strasz prr = prison_racct_find_locked(name); 4411221362Strasz sx_xunlock(&allprison_lock); 4412221362Strasz return (prr); 4413221362Strasz} 4414221362Strasz 4415221362Straszvoid 4416221362Straszprison_racct_hold(struct prison_racct *prr) 4417221362Strasz{ 4418221362Strasz 4419221362Strasz refcount_acquire(&prr->prr_refcount); 4420221362Strasz} 4421221362Strasz 4422221362Straszvoid 4423221362Straszprison_racct_free(struct prison_racct *prr) 4424221362Strasz{ 4425221362Strasz int old; 4426221362Strasz 4427221362Strasz old = prr->prr_refcount; 4428221362Strasz if (old > 1 && atomic_cmpset_int(&prr->prr_refcount, old, old - 1)) 4429221362Strasz return; 4430221362Strasz 4431221362Strasz sx_xlock(&allprison_lock); 4432221362Strasz if (refcount_release(&prr->prr_refcount)) { 4433221362Strasz racct_destroy(&prr->prr_racct); 4434221362Strasz LIST_REMOVE(prr, prr_next); 4435221362Strasz sx_xunlock(&allprison_lock); 4436221362Strasz free(prr, M_PRISON_RACCT); 4437221362Strasz 4438221362Strasz return; 4439221362Strasz } 4440221362Strasz sx_xunlock(&allprison_lock); 4441221362Strasz} 4442221362Strasz 4443221362Strasz#ifdef RACCT 4444221362Straszstatic void 4445221362Straszprison_racct_attach(struct prison *pr) 4446221362Strasz{ 4447221362Strasz struct prison_racct *prr; 4448221362Strasz 4449221362Strasz prr = prison_racct_find_locked(pr->pr_name); 4450221362Strasz KASSERT(prr != NULL, ("cannot find prison_racct")); 4451221362Strasz 4452221362Strasz pr->pr_prison_racct = prr; 4453221362Strasz} 4454221362Strasz 4455221362Straszstatic void 4456221362Straszprison_racct_detach(struct prison *pr) 4457221362Strasz{ 4458221362Strasz prison_racct_free(pr->pr_prison_racct); 4459221362Strasz pr->pr_prison_racct = NULL; 4460221362Strasz} 4461221362Strasz#endif /* RACCT */ 4462221362Strasz 4463185435Sbz#ifdef DDB 4464191673Sjamie 4465191673Sjamiestatic void 4466191673Sjamiedb_show_prison(struct prison *pr) 4467185435Sbz{ 4468192895Sjamie int fi; 4469191673Sjamie#if defined(INET) || defined(INET6) 4470191673Sjamie int ii; 4471185435Sbz#endif 4472195870Sjamie unsigned jsf; 4473185435Sbz#ifdef INET6 4474185435Sbz char ip6buf[INET6_ADDRSTRLEN]; 4475185435Sbz#endif 4476185435Sbz 4477191673Sjamie db_printf("prison %p:\n", pr); 4478191673Sjamie db_printf(" jid = %d\n", pr->pr_id); 4479191673Sjamie db_printf(" name = %s\n", pr->pr_name); 4480192895Sjamie db_printf(" parent = %p\n", pr->pr_parent); 4481191673Sjamie db_printf(" ref = %d\n", pr->pr_ref); 4482191673Sjamie db_printf(" uref = %d\n", pr->pr_uref); 4483191673Sjamie db_printf(" path = %s\n", pr->pr_path); 4484191673Sjamie db_printf(" cpuset = %d\n", pr->pr_cpuset 4485191673Sjamie ? pr->pr_cpuset->cs_id : -1); 4486194251Sjamie#ifdef VIMAGE 4487194251Sjamie db_printf(" vnet = %p\n", pr->pr_vnet); 4488194251Sjamie#endif 4489191673Sjamie db_printf(" root = %p\n", pr->pr_root); 4490191673Sjamie db_printf(" securelevel = %d\n", pr->pr_securelevel); 4491231267Smm db_printf(" devfs_rsnum = %d\n", pr->pr_devfs_rsnum); 4492202123Sbz db_printf(" children.max = %d\n", pr->pr_childmax); 4493202123Sbz db_printf(" children.cur = %d\n", pr->pr_childcount); 4494192895Sjamie db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children)); 4495192895Sjamie db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling)); 4496202123Sbz db_printf(" flags = 0x%x", pr->pr_flags); 4497192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 4498192895Sjamie fi++) 4499192895Sjamie if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi))) 4500192895Sjamie db_printf(" %s", pr_flag_names[fi]); 4501195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 4502195870Sjamie fi++) { 4503195870Sjamie jsf = pr->pr_flags & 4504195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 4505195870Sjamie db_printf(" %-16s= %s\n", pr_flag_jailsys[fi].name, 4506195870Sjamie pr_flag_jailsys[fi].disable && 4507195870Sjamie (jsf == pr_flag_jailsys[fi].disable) ? "disable" 4508195870Sjamie : (jsf == pr_flag_jailsys[fi].new) ? "new" 4509195870Sjamie : "inherit"); 4510195870Sjamie } 4511202123Sbz db_printf(" allow = 0x%x", pr->pr_allow); 4512192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 4513192895Sjamie fi++) 4514192895Sjamie if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi))) 4515192895Sjamie db_printf(" %s", pr_allow_names[fi]); 4516191673Sjamie db_printf("\n"); 4517192895Sjamie db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs); 4518194118Sjamie db_printf(" host.hostname = %s\n", pr->pr_hostname); 4519194118Sjamie db_printf(" host.domainname = %s\n", pr->pr_domainname); 4520194118Sjamie db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid); 4521193066Sjamie db_printf(" host.hostid = %lu\n", pr->pr_hostid); 4522185435Sbz#ifdef INET 4523191673Sjamie db_printf(" ip4s = %d\n", pr->pr_ip4s); 4524191673Sjamie for (ii = 0; ii < pr->pr_ip4s; ii++) 4525191673Sjamie db_printf(" %s %s\n", 4526202123Sbz ii == 0 ? "ip4.addr =" : " ", 4527191673Sjamie inet_ntoa(pr->pr_ip4[ii])); 4528185435Sbz#endif 4529185435Sbz#ifdef INET6 4530191673Sjamie db_printf(" ip6s = %d\n", pr->pr_ip6s); 4531191673Sjamie for (ii = 0; ii < pr->pr_ip6s; ii++) 4532191673Sjamie db_printf(" %s %s\n", 4533202123Sbz ii == 0 ? "ip6.addr =" : " ", 4534191673Sjamie ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); 4535191673Sjamie#endif 4536191673Sjamie} 4537191673Sjamie 4538191673SjamieDB_SHOW_COMMAND(prison, db_show_prison_command) 4539191673Sjamie{ 4540191673Sjamie struct prison *pr; 4541191673Sjamie 4542191673Sjamie if (!have_addr) { 4543192895Sjamie /* 4544192895Sjamie * Show all prisons in the list, and prison0 which is not 4545192895Sjamie * listed. 4546192895Sjamie */ 4547192895Sjamie db_show_prison(&prison0); 4548192895Sjamie if (!db_pager_quit) { 4549192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 4550192895Sjamie db_show_prison(pr); 4551192895Sjamie if (db_pager_quit) 4552192895Sjamie break; 4553192895Sjamie } 4554191673Sjamie } 4555191673Sjamie return; 4556191673Sjamie } 4557191673Sjamie 4558192895Sjamie if (addr == 0) 4559192895Sjamie pr = &prison0; 4560192895Sjamie else { 4561192895Sjamie /* Look for a prison with the ID and with references. */ 4562191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4563192895Sjamie if (pr->pr_id == addr && pr->pr_ref > 0) 4564191673Sjamie break; 4565192895Sjamie if (pr == NULL) 4566192895Sjamie /* Look again, without requiring a reference. */ 4567192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4568192895Sjamie if (pr->pr_id == addr) 4569192895Sjamie break; 4570192895Sjamie if (pr == NULL) 4571192895Sjamie /* Assume address points to a valid prison. */ 4572192895Sjamie pr = (struct prison *)addr; 4573192895Sjamie } 4574191673Sjamie db_show_prison(pr); 4575185435Sbz} 4576191673Sjamie 4577185435Sbz#endif /* DDB */ 4578