kern_jail.c revision 232278
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 232278 2012-02-29 00:30:18Z 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", 207232278Smm "allow.mount.procfs", 208192895Sjamie}; 209216861Sbzconst size_t pr_allow_names_size = sizeof(pr_allow_names); 210192895Sjamie 211192895Sjamiestatic char *pr_allow_nonames[] = { 212192895Sjamie "allow.noset_hostname", 213192895Sjamie "allow.nosysvipc", 214192895Sjamie "allow.noraw_sockets", 215192895Sjamie "allow.nochflags", 216192895Sjamie "allow.nomount", 217192895Sjamie "allow.noquotas", 218192895Sjamie "allow.nosocket_af", 219232059Smm "allow.mount.nodevfs", 220232059Smm "allow.mount.nonullfs", 221232186Smm "allow.mount.nozfs", 222232278Smm "allow.mount.noprocfs", 223192895Sjamie}; 224216861Sbzconst size_t pr_allow_nonames_size = sizeof(pr_allow_nonames); 225192895Sjamie 226196002Sjamie#define JAIL_DEFAULT_ALLOW PR_ALLOW_SET_HOSTNAME 227196002Sjamie#define JAIL_DEFAULT_ENFORCE_STATFS 2 228232059Smm#define JAIL_DEFAULT_DEVFS_RSNUM 0 229192895Sjamiestatic unsigned jail_default_allow = JAIL_DEFAULT_ALLOW; 230196002Sjamiestatic int jail_default_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 231231267Smmstatic int jail_default_devfs_rsnum = JAIL_DEFAULT_DEVFS_RSNUM; 232192895Sjamie#if defined(INET) || defined(INET6) 233193865Sjamiestatic unsigned jail_max_af_ips = 255; 234192895Sjamie#endif 235192895Sjamie 236192895Sjamie#ifdef INET 237185435Sbzstatic int 238185435Sbzqcmp_v4(const void *ip1, const void *ip2) 239185435Sbz{ 240185435Sbz in_addr_t iaa, iab; 241185435Sbz 242185435Sbz /* 243185435Sbz * We need to compare in HBO here to get the list sorted as expected 244185435Sbz * by the result of the code. Sorting NBO addresses gives you 245185435Sbz * interesting results. If you do not understand, do not try. 246185435Sbz */ 247185435Sbz iaa = ntohl(((const struct in_addr *)ip1)->s_addr); 248185435Sbz iab = ntohl(((const struct in_addr *)ip2)->s_addr); 249185435Sbz 250185435Sbz /* 251185435Sbz * Do not simply return the difference of the two numbers, the int is 252185435Sbz * not wide enough. 253185435Sbz */ 254185435Sbz if (iaa > iab) 255185435Sbz return (1); 256185435Sbz else if (iaa < iab) 257185435Sbz return (-1); 258185435Sbz else 259185435Sbz return (0); 260185435Sbz} 261185435Sbz#endif 262185435Sbz 263185435Sbz#ifdef INET6 264185435Sbzstatic int 265185435Sbzqcmp_v6(const void *ip1, const void *ip2) 266185435Sbz{ 267185435Sbz const struct in6_addr *ia6a, *ia6b; 268185435Sbz int i, rc; 269185435Sbz 270185435Sbz ia6a = (const struct in6_addr *)ip1; 271185435Sbz ia6b = (const struct in6_addr *)ip2; 272185435Sbz 273185435Sbz rc = 0; 274190466Sjamie for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) { 275185435Sbz if (ia6a->s6_addr[i] > ia6b->s6_addr[i]) 276185435Sbz rc = 1; 277185435Sbz else if (ia6a->s6_addr[i] < ia6b->s6_addr[i]) 278185435Sbz rc = -1; 279185435Sbz } 280185435Sbz return (rc); 281185435Sbz} 282185435Sbz#endif 283185435Sbz 284191673Sjamie/* 285191673Sjamie * struct jail_args { 286191673Sjamie * struct jail *jail; 287191673Sjamie * }; 288191673Sjamie */ 289191673Sjamieint 290225617Skmacysys_jail(struct thread *td, struct jail_args *uap) 291185435Sbz{ 292191673Sjamie uint32_t version; 293191673Sjamie int error; 294192895Sjamie struct jail j; 295185435Sbz 296191673Sjamie error = copyin(uap->jail, &version, sizeof(uint32_t)); 297191673Sjamie if (error) 298191673Sjamie return (error); 299185435Sbz 300191673Sjamie switch (version) { 301191673Sjamie case 0: 302191673Sjamie { 303191673Sjamie struct jail_v0 j0; 304185435Sbz 305192895Sjamie /* FreeBSD single IPv4 jails. */ 306192895Sjamie bzero(&j, sizeof(struct jail)); 307191673Sjamie error = copyin(uap->jail, &j0, sizeof(struct jail_v0)); 308191673Sjamie if (error) 309191673Sjamie return (error); 310192895Sjamie j.version = j0.version; 311192895Sjamie j.path = j0.path; 312192895Sjamie j.hostname = j0.hostname; 313192895Sjamie j.ip4s = j0.ip_number; 314191673Sjamie break; 315191673Sjamie } 316191673Sjamie 317191673Sjamie case 1: 318185435Sbz /* 319191673Sjamie * Version 1 was used by multi-IPv4 jail implementations 320191673Sjamie * that never made it into the official kernel. 321185435Sbz */ 322191673Sjamie return (EINVAL); 323185435Sbz 324191673Sjamie case 2: /* JAIL_API_VERSION */ 325191673Sjamie /* FreeBSD multi-IPv4/IPv6,noIP jails. */ 326191673Sjamie error = copyin(uap->jail, &j, sizeof(struct jail)); 327191673Sjamie if (error) 328191673Sjamie return (error); 329192895Sjamie break; 330192895Sjamie 331192895Sjamie default: 332192895Sjamie /* Sci-Fi jails are not supported, sorry. */ 333192895Sjamie return (EINVAL); 334192895Sjamie } 335192895Sjamie return (kern_jail(td, &j)); 336192895Sjamie} 337192895Sjamie 338192895Sjamieint 339192895Sjamiekern_jail(struct thread *td, struct jail *j) 340192895Sjamie{ 341193865Sjamie struct iovec optiov[2 * (4 342193865Sjamie + sizeof(pr_allow_names) / sizeof(pr_allow_names[0]) 343193865Sjamie#ifdef INET 344193865Sjamie + 1 345193865Sjamie#endif 346193865Sjamie#ifdef INET6 347193865Sjamie + 1 348193865Sjamie#endif 349193865Sjamie )]; 350192895Sjamie struct uio opt; 351192895Sjamie char *u_path, *u_hostname, *u_name; 352185435Sbz#ifdef INET 353193865Sjamie uint32_t ip4s; 354192895Sjamie struct in_addr *u_ip4; 355192895Sjamie#endif 356192895Sjamie#ifdef INET6 357192895Sjamie struct in6_addr *u_ip6; 358192895Sjamie#endif 359192895Sjamie size_t tmplen; 360192895Sjamie int error, enforce_statfs, fi; 361192895Sjamie 362192895Sjamie bzero(&optiov, sizeof(optiov)); 363192895Sjamie opt.uio_iov = optiov; 364192895Sjamie opt.uio_iovcnt = 0; 365192895Sjamie opt.uio_offset = -1; 366192895Sjamie opt.uio_resid = -1; 367192895Sjamie opt.uio_segflg = UIO_SYSSPACE; 368192895Sjamie opt.uio_rw = UIO_READ; 369192895Sjamie opt.uio_td = td; 370192895Sjamie 371192895Sjamie /* Set permissions for top-level jails from sysctls. */ 372192895Sjamie if (!jailed(td->td_ucred)) { 373192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / 374192895Sjamie sizeof(pr_allow_names[0]); fi++) { 375192895Sjamie optiov[opt.uio_iovcnt].iov_base = 376192895Sjamie (jail_default_allow & (1 << fi)) 377192895Sjamie ? pr_allow_names[fi] : pr_allow_nonames[fi]; 378192895Sjamie optiov[opt.uio_iovcnt].iov_len = 379192895Sjamie strlen(optiov[opt.uio_iovcnt].iov_base) + 1; 380192895Sjamie opt.uio_iovcnt += 2; 381192895Sjamie } 382192895Sjamie optiov[opt.uio_iovcnt].iov_base = "enforce_statfs"; 383192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("enforce_statfs"); 384192895Sjamie opt.uio_iovcnt++; 385192895Sjamie enforce_statfs = jail_default_enforce_statfs; 386192895Sjamie optiov[opt.uio_iovcnt].iov_base = &enforce_statfs; 387192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof(enforce_statfs); 388192895Sjamie opt.uio_iovcnt++; 389192895Sjamie } 390192895Sjamie 391192895Sjamie tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN; 392192895Sjamie#ifdef INET 393192895Sjamie ip4s = (j->version == 0) ? 1 : j->ip4s; 394192895Sjamie if (ip4s > jail_max_af_ips) 395192895Sjamie return (EINVAL); 396192895Sjamie tmplen += ip4s * sizeof(struct in_addr); 397191673Sjamie#else 398192895Sjamie if (j->ip4s > 0) 399192895Sjamie return (EINVAL); 400191673Sjamie#endif 401191673Sjamie#ifdef INET6 402192895Sjamie if (j->ip6s > jail_max_af_ips) 403192895Sjamie return (EINVAL); 404192895Sjamie tmplen += j->ip6s * sizeof(struct in6_addr); 405191673Sjamie#else 406192895Sjamie if (j->ip6s > 0) 407192895Sjamie return (EINVAL); 408191673Sjamie#endif 409192895Sjamie u_path = malloc(tmplen, M_TEMP, M_WAITOK); 410192895Sjamie u_hostname = u_path + MAXPATHLEN; 411192895Sjamie u_name = u_hostname + MAXHOSTNAMELEN; 412191673Sjamie#ifdef INET 413192895Sjamie u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN); 414191673Sjamie#endif 415191673Sjamie#ifdef INET6 416191673Sjamie#ifdef INET 417192895Sjamie u_ip6 = (struct in6_addr *)(u_ip4 + ip4s); 418191673Sjamie#else 419192895Sjamie u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN); 420191673Sjamie#endif 421191673Sjamie#endif 422192895Sjamie optiov[opt.uio_iovcnt].iov_base = "path"; 423192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("path"); 424192895Sjamie opt.uio_iovcnt++; 425192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_path; 426192895Sjamie error = copyinstr(j->path, u_path, MAXPATHLEN, 427192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 428192895Sjamie if (error) { 429192895Sjamie free(u_path, M_TEMP); 430192895Sjamie return (error); 431192895Sjamie } 432192895Sjamie opt.uio_iovcnt++; 433192895Sjamie optiov[opt.uio_iovcnt].iov_base = "host.hostname"; 434192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("host.hostname"); 435192895Sjamie opt.uio_iovcnt++; 436192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_hostname; 437192895Sjamie error = copyinstr(j->hostname, u_hostname, MAXHOSTNAMELEN, 438192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 439192895Sjamie if (error) { 440192895Sjamie free(u_path, M_TEMP); 441192895Sjamie return (error); 442192895Sjamie } 443192895Sjamie opt.uio_iovcnt++; 444192895Sjamie if (j->jailname != NULL) { 445192895Sjamie optiov[opt.uio_iovcnt].iov_base = "name"; 446192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("name"); 447192895Sjamie opt.uio_iovcnt++; 448192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_name; 449192895Sjamie error = copyinstr(j->jailname, u_name, MAXHOSTNAMELEN, 450192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 451191673Sjamie if (error) { 452191673Sjamie free(u_path, M_TEMP); 453191673Sjamie return (error); 454191673Sjamie } 455192895Sjamie opt.uio_iovcnt++; 456192895Sjamie } 457191673Sjamie#ifdef INET 458192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; 459192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); 460192895Sjamie opt.uio_iovcnt++; 461192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip4; 462192895Sjamie optiov[opt.uio_iovcnt].iov_len = ip4s * sizeof(struct in_addr); 463192895Sjamie if (j->version == 0) 464192895Sjamie u_ip4->s_addr = j->ip4s; 465192895Sjamie else { 466192895Sjamie error = copyin(j->ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len); 467191673Sjamie if (error) { 468191673Sjamie free(u_path, M_TEMP); 469191673Sjamie return (error); 470191673Sjamie } 471192895Sjamie } 472192895Sjamie opt.uio_iovcnt++; 473185435Sbz#endif 474185435Sbz#ifdef INET6 475192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip6.addr"; 476192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr"); 477192895Sjamie opt.uio_iovcnt++; 478192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip6; 479192895Sjamie optiov[opt.uio_iovcnt].iov_len = j->ip6s * sizeof(struct in6_addr); 480192895Sjamie error = copyin(j->ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len); 481192895Sjamie if (error) { 482192895Sjamie free(u_path, M_TEMP); 483192895Sjamie return (error); 484192895Sjamie } 485192895Sjamie opt.uio_iovcnt++; 486185435Sbz#endif 487192895Sjamie KASSERT(opt.uio_iovcnt <= sizeof(optiov) / sizeof(optiov[0]), 488192895Sjamie ("kern_jail: too many iovecs (%d)", opt.uio_iovcnt)); 489191673Sjamie error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH); 490191673Sjamie free(u_path, M_TEMP); 491191673Sjamie return (error); 492185435Sbz} 493185435Sbz 494192895Sjamie 495191673Sjamie/* 496191673Sjamie * struct jail_set_args { 497191673Sjamie * struct iovec *iovp; 498191673Sjamie * unsigned int iovcnt; 499191673Sjamie * int flags; 500191673Sjamie * }; 501191673Sjamie */ 502191673Sjamieint 503225617Skmacysys_jail_set(struct thread *td, struct jail_set_args *uap) 504185435Sbz{ 505191673Sjamie struct uio *auio; 506191673Sjamie int error; 507191673Sjamie 508191673Sjamie /* Check that we have an even number of iovecs. */ 509191673Sjamie if (uap->iovcnt & 1) 510191673Sjamie return (EINVAL); 511191673Sjamie 512191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 513191673Sjamie if (error) 514191673Sjamie return (error); 515191673Sjamie error = kern_jail_set(td, auio, uap->flags); 516191673Sjamie free(auio, M_IOV); 517191673Sjamie return (error); 518191673Sjamie} 519191673Sjamie 520191673Sjamieint 521191673Sjamiekern_jail_set(struct thread *td, struct uio *optuio, int flags) 522191673Sjamie{ 523191673Sjamie struct nameidata nd; 524185435Sbz#ifdef INET 525190466Sjamie struct in_addr *ip4; 526185435Sbz#endif 527185435Sbz#ifdef INET6 528185435Sbz struct in6_addr *ip6; 529185435Sbz#endif 530191673Sjamie struct vfsopt *opt; 531191673Sjamie struct vfsoptlist *opts; 532196135Sbz struct prison *pr, *deadpr, *mypr, *ppr, *tpr; 533191673Sjamie struct vnode *root; 534196835Sjamie char *domain, *errmsg, *host, *name, *namelc, *p, *path, *uuid; 535230407Smm char *g_path; 536192895Sjamie#if defined(INET) || defined(INET6) 537196135Sbz struct prison *tppr; 538191673Sjamie void *op; 539192895Sjamie#endif 540193066Sjamie unsigned long hid; 541192895Sjamie size_t namelen, onamelen; 542192895Sjamie int created, cuflags, descend, enforce, error, errmsg_len, errmsg_pos; 543231267Smm int gotchildmax, gotenforce, gothid, gotrsnum, gotslevel; 544195870Sjamie int fi, jid, jsys, len, level; 545231267Smm int childmax, rsnum, slevel, vfslocked; 546230129Smm int fullpath_disabled; 547191673Sjamie#if defined(INET) || defined(INET6) 548192895Sjamie int ii, ij; 549191673Sjamie#endif 550191673Sjamie#ifdef INET 551195974Sjamie int ip4s, redo_ip4; 552191673Sjamie#endif 553191673Sjamie#ifdef INET6 554195974Sjamie int ip6s, redo_ip6; 555191673Sjamie#endif 556224290Smckusick uint64_t pr_allow, ch_allow, pr_flags, ch_flags; 557224290Smckusick unsigned tallow; 558191673Sjamie char numbuf[12]; 559185435Sbz 560191673Sjamie error = priv_check(td, PRIV_JAIL_SET); 561191673Sjamie if (!error && (flags & JAIL_ATTACH)) 562191673Sjamie error = priv_check(td, PRIV_JAIL_ATTACH); 563191673Sjamie if (error) 564191673Sjamie return (error); 565192895Sjamie mypr = ppr = td->td_ucred->cr_prison; 566194762Sjamie if ((flags & JAIL_CREATE) && mypr->pr_childmax == 0) 567192895Sjamie return (EPERM); 568191673Sjamie if (flags & ~JAIL_SET_MASK) 569191673Sjamie return (EINVAL); 570191673Sjamie 571185435Sbz /* 572191673Sjamie * Check all the parameters before committing to anything. Not all 573191673Sjamie * errors can be caught early, but we may as well try. Also, this 574191673Sjamie * takes care of some expensive stuff (path lookup) before getting 575191673Sjamie * the allprison lock. 576185435Sbz * 577191673Sjamie * XXX Jails are not filesystems, and jail parameters are not mount 578191673Sjamie * options. But it makes more sense to re-use the vfsopt code 579191673Sjamie * than duplicate it under a different name. 580185435Sbz */ 581191673Sjamie error = vfs_buildopts(optuio, &opts); 582191673Sjamie if (error) 583191673Sjamie return (error); 584185435Sbz#ifdef INET 585185435Sbz ip4 = NULL; 586185435Sbz#endif 587185435Sbz#ifdef INET6 588185435Sbz ip6 = NULL; 589185435Sbz#endif 590230407Smm g_path = NULL; 591191673Sjamie 592191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 593191673Sjamie if (error == ENOENT) 594191673Sjamie jid = 0; 595191673Sjamie else if (error != 0) 596191673Sjamie goto done_free; 597191673Sjamie 598191673Sjamie error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel)); 599191673Sjamie if (error == ENOENT) 600191673Sjamie gotslevel = 0; 601191673Sjamie else if (error != 0) 602191673Sjamie goto done_free; 603191673Sjamie else 604191673Sjamie gotslevel = 1; 605191673Sjamie 606194762Sjamie error = 607194762Sjamie vfs_copyopt(opts, "children.max", &childmax, sizeof(childmax)); 608194762Sjamie if (error == ENOENT) 609194762Sjamie gotchildmax = 0; 610194762Sjamie else if (error != 0) 611194762Sjamie goto done_free; 612194762Sjamie else 613194762Sjamie gotchildmax = 1; 614194762Sjamie 615192895Sjamie error = vfs_copyopt(opts, "enforce_statfs", &enforce, sizeof(enforce)); 616212436Sjamie if (error == ENOENT) 617212436Sjamie gotenforce = 0; 618212436Sjamie else if (error != 0) 619192895Sjamie goto done_free; 620212436Sjamie else if (enforce < 0 || enforce > 2) { 621212436Sjamie error = EINVAL; 622212436Sjamie goto done_free; 623212436Sjamie } else 624212436Sjamie gotenforce = 1; 625192895Sjamie 626231267Smm error = vfs_copyopt(opts, "devfs_ruleset", &rsnum, sizeof(rsnum)); 627231267Smm if (error == ENOENT) 628231267Smm gotrsnum = 0; 629231267Smm else if (error != 0) 630231267Smm goto done_free; 631231267Smm else 632231267Smm gotrsnum = 1; 633231267Smm 634191673Sjamie pr_flags = ch_flags = 0; 635192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 636192895Sjamie fi++) { 637192895Sjamie if (pr_flag_names[fi] == NULL) 638192895Sjamie continue; 639192895Sjamie vfs_flagopt(opts, pr_flag_names[fi], &pr_flags, 1 << fi); 640192895Sjamie vfs_flagopt(opts, pr_flag_nonames[fi], &ch_flags, 1 << fi); 641192895Sjamie } 642191673Sjamie ch_flags |= pr_flags; 643195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 644195870Sjamie fi++) { 645195870Sjamie error = vfs_copyopt(opts, pr_flag_jailsys[fi].name, &jsys, 646195870Sjamie sizeof(jsys)); 647195870Sjamie if (error == ENOENT) 648195870Sjamie continue; 649195870Sjamie if (error != 0) 650195870Sjamie goto done_free; 651195870Sjamie switch (jsys) { 652195870Sjamie case JAIL_SYS_DISABLE: 653195870Sjamie if (!pr_flag_jailsys[fi].disable) { 654195870Sjamie error = EINVAL; 655195870Sjamie goto done_free; 656195870Sjamie } 657195870Sjamie pr_flags |= pr_flag_jailsys[fi].disable; 658195870Sjamie break; 659195870Sjamie case JAIL_SYS_NEW: 660195870Sjamie pr_flags |= pr_flag_jailsys[fi].new; 661195870Sjamie break; 662195870Sjamie case JAIL_SYS_INHERIT: 663195870Sjamie break; 664195870Sjamie default: 665195870Sjamie error = EINVAL; 666195870Sjamie goto done_free; 667195870Sjamie } 668195870Sjamie ch_flags |= 669195870Sjamie pr_flag_jailsys[fi].new | pr_flag_jailsys[fi].disable; 670195870Sjamie } 671211085Sjamie if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE 672211085Sjamie && !(pr_flags & PR_PERSIST)) { 673211085Sjamie error = EINVAL; 674211085Sjamie vfs_opterror(opts, "new jail must persist or attach"); 675211085Sjamie goto done_errmsg; 676211085Sjamie } 677194251Sjamie#ifdef VIMAGE 678194251Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_VNET)) { 679194251Sjamie error = EINVAL; 680194251Sjamie vfs_opterror(opts, "vnet cannot be changed after creation"); 681194251Sjamie goto done_errmsg; 682194251Sjamie } 683194251Sjamie#endif 684195974Sjamie#ifdef INET 685195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP4_USER)) { 686195974Sjamie error = EINVAL; 687195974Sjamie vfs_opterror(opts, "ip4 cannot be changed after creation"); 688195974Sjamie goto done_errmsg; 689195974Sjamie } 690195974Sjamie#endif 691195974Sjamie#ifdef INET6 692195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP6_USER)) { 693195974Sjamie error = EINVAL; 694195974Sjamie vfs_opterror(opts, "ip6 cannot be changed after creation"); 695195974Sjamie goto done_errmsg; 696195974Sjamie } 697195974Sjamie#endif 698191673Sjamie 699192895Sjamie pr_allow = ch_allow = 0; 700192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 701192895Sjamie fi++) { 702192895Sjamie vfs_flagopt(opts, pr_allow_names[fi], &pr_allow, 1 << fi); 703192895Sjamie vfs_flagopt(opts, pr_allow_nonames[fi], &ch_allow, 1 << fi); 704192895Sjamie } 705192895Sjamie ch_allow |= pr_allow; 706192895Sjamie 707191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 708191673Sjamie if (error == ENOENT) 709191673Sjamie name = NULL; 710191673Sjamie else if (error != 0) 711191673Sjamie goto done_free; 712191673Sjamie else { 713191673Sjamie if (len == 0 || name[len - 1] != '\0') { 714191673Sjamie error = EINVAL; 715191673Sjamie goto done_free; 716191673Sjamie } 717191673Sjamie if (len > MAXHOSTNAMELEN) { 718191673Sjamie error = ENAMETOOLONG; 719191673Sjamie goto done_free; 720191673Sjamie } 721191673Sjamie } 722191673Sjamie 723191673Sjamie error = vfs_getopt(opts, "host.hostname", (void **)&host, &len); 724191673Sjamie if (error == ENOENT) 725191673Sjamie host = NULL; 726191673Sjamie else if (error != 0) 727191673Sjamie goto done_free; 728191673Sjamie else { 729193066Sjamie ch_flags |= PR_HOST; 730193066Sjamie pr_flags |= PR_HOST; 731191673Sjamie if (len == 0 || host[len - 1] != '\0') { 732191673Sjamie error = EINVAL; 733191673Sjamie goto done_free; 734191673Sjamie } 735191673Sjamie if (len > MAXHOSTNAMELEN) { 736191673Sjamie error = ENAMETOOLONG; 737191673Sjamie goto done_free; 738191673Sjamie } 739191673Sjamie } 740191673Sjamie 741193066Sjamie error = vfs_getopt(opts, "host.domainname", (void **)&domain, &len); 742193066Sjamie if (error == ENOENT) 743193066Sjamie domain = NULL; 744193066Sjamie else if (error != 0) 745193066Sjamie goto done_free; 746193066Sjamie else { 747193066Sjamie ch_flags |= PR_HOST; 748193066Sjamie pr_flags |= PR_HOST; 749193066Sjamie if (len == 0 || domain[len - 1] != '\0') { 750193066Sjamie error = EINVAL; 751193066Sjamie goto done_free; 752193066Sjamie } 753193066Sjamie if (len > MAXHOSTNAMELEN) { 754193066Sjamie error = ENAMETOOLONG; 755193066Sjamie goto done_free; 756193066Sjamie } 757193066Sjamie } 758193066Sjamie 759193066Sjamie error = vfs_getopt(opts, "host.hostuuid", (void **)&uuid, &len); 760193066Sjamie if (error == ENOENT) 761193066Sjamie uuid = NULL; 762193066Sjamie else if (error != 0) 763193066Sjamie goto done_free; 764193066Sjamie else { 765193066Sjamie ch_flags |= PR_HOST; 766193066Sjamie pr_flags |= PR_HOST; 767193066Sjamie if (len == 0 || uuid[len - 1] != '\0') { 768193066Sjamie error = EINVAL; 769193066Sjamie goto done_free; 770193066Sjamie } 771193066Sjamie if (len > HOSTUUIDLEN) { 772193066Sjamie error = ENAMETOOLONG; 773193066Sjamie goto done_free; 774193066Sjamie } 775193066Sjamie } 776193066Sjamie 777205014Snwhitehorn#ifdef COMPAT_FREEBSD32 778217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 779193066Sjamie uint32_t hid32; 780193066Sjamie 781193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid32, sizeof(hid32)); 782193066Sjamie hid = hid32; 783193066Sjamie } else 784193066Sjamie#endif 785193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid, sizeof(hid)); 786193066Sjamie if (error == ENOENT) 787193066Sjamie gothid = 0; 788193066Sjamie else if (error != 0) 789193066Sjamie goto done_free; 790193066Sjamie else { 791193066Sjamie gothid = 1; 792193066Sjamie ch_flags |= PR_HOST; 793193066Sjamie pr_flags |= PR_HOST; 794193066Sjamie } 795193066Sjamie 796185435Sbz#ifdef INET 797191673Sjamie error = vfs_getopt(opts, "ip4.addr", &op, &ip4s); 798191673Sjamie if (error == ENOENT) 799195870Sjamie ip4s = (pr_flags & PR_IP4_DISABLE) ? 0 : -1; 800191673Sjamie else if (error != 0) 801191673Sjamie goto done_free; 802191673Sjamie else if (ip4s & (sizeof(*ip4) - 1)) { 803191673Sjamie error = EINVAL; 804191673Sjamie goto done_free; 805192895Sjamie } else { 806195870Sjamie ch_flags |= PR_IP4_USER | PR_IP4_DISABLE; 807195870Sjamie if (ip4s == 0) 808195870Sjamie pr_flags |= PR_IP4_USER | PR_IP4_DISABLE; 809195870Sjamie else { 810195870Sjamie pr_flags = (pr_flags & ~PR_IP4_DISABLE) | PR_IP4_USER; 811192895Sjamie ip4s /= sizeof(*ip4); 812192895Sjamie if (ip4s > jail_max_af_ips) { 813185435Sbz error = EINVAL; 814192895Sjamie vfs_opterror(opts, "too many IPv4 addresses"); 815192895Sjamie goto done_errmsg; 816185435Sbz } 817195974Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 818192895Sjamie bcopy(op, ip4, ip4s * sizeof(*ip4)); 819192895Sjamie /* 820192895Sjamie * IP addresses are all sorted but ip[0] to preserve 821192895Sjamie * the primary IP address as given from userland. 822192895Sjamie * This special IP is used for unbound outgoing 823202116Sbz * connections as well for "loopback" traffic in case 824202116Sbz * source address selection cannot find any more fitting 825202116Sbz * address to connect from. 826192895Sjamie */ 827192895Sjamie if (ip4s > 1) 828192895Sjamie qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4); 829192895Sjamie /* 830192895Sjamie * Check for duplicate addresses and do some simple 831192895Sjamie * zero and broadcast checks. If users give other bogus 832192895Sjamie * addresses it is their problem. 833192895Sjamie * 834192895Sjamie * We do not have to care about byte order for these 835192895Sjamie * checks so we will do them in NBO. 836192895Sjamie */ 837192895Sjamie for (ii = 0; ii < ip4s; ii++) { 838192895Sjamie if (ip4[ii].s_addr == INADDR_ANY || 839192895Sjamie ip4[ii].s_addr == INADDR_BROADCAST) { 840192895Sjamie error = EINVAL; 841192895Sjamie goto done_free; 842192895Sjamie } 843192895Sjamie if ((ii+1) < ip4s && 844192895Sjamie (ip4[0].s_addr == ip4[ii+1].s_addr || 845192895Sjamie ip4[ii].s_addr == ip4[ii+1].s_addr)) { 846192895Sjamie error = EINVAL; 847192895Sjamie goto done_free; 848192895Sjamie } 849192895Sjamie } 850185435Sbz } 851191673Sjamie } 852191673Sjamie#endif 853185435Sbz 854185435Sbz#ifdef INET6 855191673Sjamie error = vfs_getopt(opts, "ip6.addr", &op, &ip6s); 856191673Sjamie if (error == ENOENT) 857195870Sjamie ip6s = (pr_flags & PR_IP6_DISABLE) ? 0 : -1; 858191673Sjamie else if (error != 0) 859191673Sjamie goto done_free; 860191673Sjamie else if (ip6s & (sizeof(*ip6) - 1)) { 861191673Sjamie error = EINVAL; 862191673Sjamie goto done_free; 863192895Sjamie } else { 864195870Sjamie ch_flags |= PR_IP6_USER | PR_IP6_DISABLE; 865195870Sjamie if (ip6s == 0) 866195870Sjamie pr_flags |= PR_IP6_USER | PR_IP6_DISABLE; 867195870Sjamie else { 868195870Sjamie pr_flags = (pr_flags & ~PR_IP6_DISABLE) | PR_IP6_USER; 869192895Sjamie ip6s /= sizeof(*ip6); 870192895Sjamie if (ip6s > jail_max_af_ips) { 871185435Sbz error = EINVAL; 872192895Sjamie vfs_opterror(opts, "too many IPv6 addresses"); 873192895Sjamie goto done_errmsg; 874185435Sbz } 875195974Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 876192895Sjamie bcopy(op, ip6, ip6s * sizeof(*ip6)); 877192895Sjamie if (ip6s > 1) 878192895Sjamie qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6); 879192895Sjamie for (ii = 0; ii < ip6s; ii++) { 880192895Sjamie if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) { 881192895Sjamie error = EINVAL; 882192895Sjamie goto done_free; 883192895Sjamie } 884192895Sjamie if ((ii+1) < ip6s && 885192895Sjamie (IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) || 886192895Sjamie IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1]))) 887192895Sjamie { 888192895Sjamie error = EINVAL; 889192895Sjamie goto done_free; 890192895Sjamie } 891192895Sjamie } 892185435Sbz } 893191673Sjamie } 894185435Sbz#endif 895185435Sbz 896195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 897195945Sjamie if ((ch_flags & PR_VNET) && (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 898195945Sjamie error = EINVAL; 899195945Sjamie vfs_opterror(opts, 900195945Sjamie "vnet jails cannot have IP address restrictions"); 901195945Sjamie goto done_errmsg; 902195945Sjamie } 903195945Sjamie#endif 904195945Sjamie 905230143Smm fullpath_disabled = 0; 906191673Sjamie root = NULL; 907191673Sjamie error = vfs_getopt(opts, "path", (void **)&path, &len); 908191673Sjamie if (error == ENOENT) 909191673Sjamie path = NULL; 910191673Sjamie else if (error != 0) 911191673Sjamie goto done_free; 912191673Sjamie else { 913191673Sjamie if (flags & JAIL_UPDATE) { 914191673Sjamie error = EINVAL; 915191673Sjamie vfs_opterror(opts, 916191673Sjamie "path cannot be changed after creation"); 917191673Sjamie goto done_errmsg; 918191673Sjamie } 919191673Sjamie if (len == 0 || path[len - 1] != '\0') { 920191673Sjamie error = EINVAL; 921191673Sjamie goto done_free; 922191673Sjamie } 923230129Smm NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE, UIO_SYSSPACE, 924230129Smm path, td); 925230129Smm error = namei(&nd); 926230129Smm if (error) 927230129Smm goto done_free; 928230129Smm vfslocked = NDHASGIANT(&nd); 929230129Smm root = nd.ni_vp; 930230129Smm NDFREE(&nd, NDF_ONLY_PNBUF); 931230407Smm g_path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 932230407Smm strlcpy(g_path, path, MAXPATHLEN); 933230407Smm error = vn_path_to_global_path(td, root, g_path, MAXPATHLEN); 934230407Smm if (error == 0) 935230407Smm path = g_path; 936230407Smm else if (error == ENODEV) { 937230129Smm /* proceed if sysctl debug.disablefullpath == 1 */ 938230129Smm fullpath_disabled = 1; 939230129Smm if (len < 2 || (len == 2 && path[0] == '/')) 940230129Smm path = NULL; 941230407Smm } else { 942230129Smm /* exit on other errors */ 943230129Smm VFS_UNLOCK_GIANT(vfslocked); 944230129Smm goto done_free; 945230129Smm } 946230129Smm if (root->v_type != VDIR) { 947230129Smm error = ENOTDIR; 948230129Smm vput(root); 949230129Smm VFS_UNLOCK_GIANT(vfslocked); 950230129Smm goto done_free; 951230129Smm } 952230129Smm VOP_UNLOCK(root, 0); 953230129Smm VFS_UNLOCK_GIANT(vfslocked); 954230129Smm if (fullpath_disabled) { 955192895Sjamie /* Leave room for a real-root full pathname. */ 956192895Sjamie if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/") 957192895Sjamie ? strlen(mypr->pr_path) : 0) > MAXPATHLEN) { 958192895Sjamie error = ENAMETOOLONG; 959192895Sjamie goto done_free; 960192895Sjamie } 961191673Sjamie } 962191673Sjamie } 963185435Sbz 964191673Sjamie /* 965191673Sjamie * Grab the allprison lock before letting modules check their 966191673Sjamie * parameters. Once we have it, do not let go so we'll have a 967191673Sjamie * consistent view of the OSD list. 968191673Sjamie */ 969191673Sjamie sx_xlock(&allprison_lock); 970191673Sjamie error = osd_jail_call(NULL, PR_METHOD_CHECK, opts); 971191673Sjamie if (error) 972191673Sjamie goto done_unlock_list; 973185435Sbz 974191673Sjamie /* By now, all parameters should have been noted. */ 975191673Sjamie TAILQ_FOREACH(opt, opts, link) { 976191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 977191673Sjamie error = EINVAL; 978191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 979191673Sjamie goto done_unlock_list; 980191673Sjamie } 981191673Sjamie } 982191673Sjamie 983185435Sbz /* 984191673Sjamie * See if we are creating a new record or updating an existing one. 985191673Sjamie * This abuses the file error codes ENOENT and EEXIST. 986185435Sbz */ 987191673Sjamie cuflags = flags & (JAIL_CREATE | JAIL_UPDATE); 988191673Sjamie if (!cuflags) { 989191673Sjamie error = EINVAL; 990191673Sjamie vfs_opterror(opts, "no valid operation (create or update)"); 991191673Sjamie goto done_unlock_list; 992191673Sjamie } 993191673Sjamie pr = NULL; 994196835Sjamie namelc = NULL; 995196835Sjamie if (cuflags == JAIL_CREATE && jid == 0 && name != NULL) { 996196835Sjamie namelc = strrchr(name, '.'); 997196835Sjamie jid = strtoul(namelc != NULL ? namelc + 1 : name, &p, 10); 998196835Sjamie if (*p != '\0') 999196835Sjamie jid = 0; 1000196835Sjamie } 1001191673Sjamie if (jid != 0) { 1002192895Sjamie /* 1003192895Sjamie * See if a requested jid already exists. There is an 1004192895Sjamie * information leak here if the jid exists but is not within 1005192895Sjamie * the caller's jail hierarchy. Jail creators will get EEXIST 1006192895Sjamie * even though they cannot see the jail, and CREATE | UPDATE 1007192895Sjamie * will return ENOENT which is not normally a valid error. 1008192895Sjamie */ 1009191673Sjamie if (jid < 0) { 1010191673Sjamie error = EINVAL; 1011191673Sjamie vfs_opterror(opts, "negative jid"); 1012191673Sjamie goto done_unlock_list; 1013191673Sjamie } 1014191673Sjamie pr = prison_find(jid); 1015191673Sjamie if (pr != NULL) { 1016192895Sjamie ppr = pr->pr_parent; 1017191673Sjamie /* Create: jid must not exist. */ 1018191673Sjamie if (cuflags == JAIL_CREATE) { 1019191673Sjamie mtx_unlock(&pr->pr_mtx); 1020191673Sjamie error = EEXIST; 1021191673Sjamie vfs_opterror(opts, "jail %d already exists", 1022191673Sjamie jid); 1023191673Sjamie goto done_unlock_list; 1024191673Sjamie } 1025192895Sjamie if (!prison_ischild(mypr, pr)) { 1026192895Sjamie mtx_unlock(&pr->pr_mtx); 1027192895Sjamie pr = NULL; 1028192895Sjamie } else if (pr->pr_uref == 0) { 1029191673Sjamie if (!(flags & JAIL_DYING)) { 1030191673Sjamie mtx_unlock(&pr->pr_mtx); 1031191673Sjamie error = ENOENT; 1032191673Sjamie vfs_opterror(opts, "jail %d is dying", 1033191673Sjamie jid); 1034191673Sjamie goto done_unlock_list; 1035191673Sjamie } else if ((flags & JAIL_ATTACH) || 1036191673Sjamie (pr_flags & PR_PERSIST)) { 1037191673Sjamie /* 1038191673Sjamie * A dying jail might be resurrected 1039191673Sjamie * (via attach or persist), but first 1040191673Sjamie * it must determine if another jail 1041191673Sjamie * has claimed its name. Accomplish 1042191673Sjamie * this by implicitly re-setting the 1043191673Sjamie * name. 1044191673Sjamie */ 1045191673Sjamie if (name == NULL) 1046192895Sjamie name = prison_name(mypr, pr); 1047191673Sjamie } 1048191673Sjamie } 1049191673Sjamie } 1050191673Sjamie if (pr == NULL) { 1051191673Sjamie /* Update: jid must exist. */ 1052191673Sjamie if (cuflags == JAIL_UPDATE) { 1053191673Sjamie error = ENOENT; 1054191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1055191673Sjamie goto done_unlock_list; 1056191673Sjamie } 1057191673Sjamie } 1058191673Sjamie } 1059191673Sjamie /* 1060191673Sjamie * If the caller provided a name, look for a jail by that name. 1061191673Sjamie * This has different semantics for creates and updates keyed by jid 1062191673Sjamie * (where the name must not already exist in a different jail), 1063191673Sjamie * and updates keyed by the name itself (where the name must exist 1064191673Sjamie * because that is the jail being updated). 1065191673Sjamie */ 1066191673Sjamie if (name != NULL) { 1067196835Sjamie namelc = strrchr(name, '.'); 1068196835Sjamie if (namelc == NULL) 1069196835Sjamie namelc = name; 1070196835Sjamie else { 1071192895Sjamie /* 1072192895Sjamie * This is a hierarchical name. Split it into the 1073192895Sjamie * parent and child names, and make sure the parent 1074192895Sjamie * exists or matches an already found jail. 1075192895Sjamie */ 1076196835Sjamie *namelc = '\0'; 1077192895Sjamie if (pr != NULL) { 1078196835Sjamie if (strncmp(name, ppr->pr_name, namelc - name) 1079196835Sjamie || ppr->pr_name[namelc - name] != '\0') { 1080192895Sjamie mtx_unlock(&pr->pr_mtx); 1081192895Sjamie error = EINVAL; 1082192895Sjamie vfs_opterror(opts, 1083192895Sjamie "cannot change jail's parent"); 1084192895Sjamie goto done_unlock_list; 1085192895Sjamie } 1086192895Sjamie } else { 1087192895Sjamie ppr = prison_find_name(mypr, name); 1088192895Sjamie if (ppr == NULL) { 1089192895Sjamie error = ENOENT; 1090192895Sjamie vfs_opterror(opts, 1091192895Sjamie "jail \"%s\" not found", name); 1092192895Sjamie goto done_unlock_list; 1093192895Sjamie } 1094192895Sjamie mtx_unlock(&ppr->pr_mtx); 1095192895Sjamie } 1096196835Sjamie name = ++namelc; 1097192895Sjamie } 1098191673Sjamie if (name[0] != '\0') { 1099192895Sjamie namelen = 1100192895Sjamie (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1101192895Sjamie name_again: 1102191673Sjamie deadpr = NULL; 1103192895Sjamie FOREACH_PRISON_CHILD(ppr, tpr) { 1104191673Sjamie if (tpr != pr && tpr->pr_ref > 0 && 1105192895Sjamie !strcmp(tpr->pr_name + namelen, name)) { 1106191673Sjamie if (pr == NULL && 1107191673Sjamie cuflags != JAIL_CREATE) { 1108191673Sjamie mtx_lock(&tpr->pr_mtx); 1109191673Sjamie if (tpr->pr_ref > 0) { 1110191673Sjamie /* 1111191673Sjamie * Use this jail 1112191673Sjamie * for updates. 1113191673Sjamie */ 1114191673Sjamie if (tpr->pr_uref > 0) { 1115191673Sjamie pr = tpr; 1116191673Sjamie break; 1117191673Sjamie } 1118191673Sjamie deadpr = tpr; 1119191673Sjamie } 1120191673Sjamie mtx_unlock(&tpr->pr_mtx); 1121191673Sjamie } else if (tpr->pr_uref > 0) { 1122191673Sjamie /* 1123191673Sjamie * Create, or update(jid): 1124191673Sjamie * name must not exist in an 1125192895Sjamie * active sibling jail. 1126191673Sjamie */ 1127191673Sjamie error = EEXIST; 1128191673Sjamie if (pr != NULL) 1129191673Sjamie mtx_unlock(&pr->pr_mtx); 1130191673Sjamie vfs_opterror(opts, 1131191673Sjamie "jail \"%s\" already exists", 1132191673Sjamie name); 1133191673Sjamie goto done_unlock_list; 1134191673Sjamie } 1135191673Sjamie } 1136191673Sjamie } 1137191673Sjamie /* If no active jail is found, use a dying one. */ 1138191673Sjamie if (deadpr != NULL && pr == NULL) { 1139191673Sjamie if (flags & JAIL_DYING) { 1140191673Sjamie mtx_lock(&deadpr->pr_mtx); 1141191673Sjamie if (deadpr->pr_ref == 0) { 1142191673Sjamie mtx_unlock(&deadpr->pr_mtx); 1143191673Sjamie goto name_again; 1144191673Sjamie } 1145191673Sjamie pr = deadpr; 1146191673Sjamie } else if (cuflags == JAIL_UPDATE) { 1147191673Sjamie error = ENOENT; 1148191673Sjamie vfs_opterror(opts, 1149191673Sjamie "jail \"%s\" is dying", name); 1150191673Sjamie goto done_unlock_list; 1151191673Sjamie } 1152191673Sjamie } 1153191673Sjamie /* Update: name must exist if no jid. */ 1154191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1155191673Sjamie error = ENOENT; 1156191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1157191673Sjamie name); 1158191673Sjamie goto done_unlock_list; 1159191673Sjamie } 1160191673Sjamie } 1161191673Sjamie } 1162191673Sjamie /* Update: must provide a jid or name. */ 1163191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1164191673Sjamie error = ENOENT; 1165191673Sjamie vfs_opterror(opts, "update specified no jail"); 1166191673Sjamie goto done_unlock_list; 1167191673Sjamie } 1168185435Sbz 1169191673Sjamie /* If there's no prison to update, create a new one and link it in. */ 1170191673Sjamie if (pr == NULL) { 1171194762Sjamie for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent) 1172194762Sjamie if (tpr->pr_childcount >= tpr->pr_childmax) { 1173194762Sjamie error = EPERM; 1174194762Sjamie vfs_opterror(opts, "prison limit exceeded"); 1175194762Sjamie goto done_unlock_list; 1176194762Sjamie } 1177191673Sjamie created = 1; 1178192895Sjamie mtx_lock(&ppr->pr_mtx); 1179192895Sjamie if (ppr->pr_ref == 0 || (ppr->pr_flags & PR_REMOVE)) { 1180192895Sjamie mtx_unlock(&ppr->pr_mtx); 1181192895Sjamie error = ENOENT; 1182192895Sjamie vfs_opterror(opts, "parent jail went away!"); 1183192895Sjamie goto done_unlock_list; 1184192895Sjamie } 1185192895Sjamie ppr->pr_ref++; 1186192895Sjamie ppr->pr_uref++; 1187192895Sjamie mtx_unlock(&ppr->pr_mtx); 1188191673Sjamie pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); 1189191673Sjamie if (jid == 0) { 1190191673Sjamie /* Find the next free jid. */ 1191191673Sjamie jid = lastprid + 1; 1192191673Sjamie findnext: 1193191673Sjamie if (jid == JAIL_MAX) 1194191673Sjamie jid = 1; 1195191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) { 1196191673Sjamie if (tpr->pr_id < jid) 1197191673Sjamie continue; 1198191673Sjamie if (tpr->pr_id > jid || tpr->pr_ref == 0) { 1199191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1200191673Sjamie break; 1201191673Sjamie } 1202191673Sjamie if (jid == lastprid) { 1203191673Sjamie error = EAGAIN; 1204191673Sjamie vfs_opterror(opts, 1205191673Sjamie "no available jail IDs"); 1206191673Sjamie free(pr, M_PRISON); 1207192895Sjamie prison_deref(ppr, PD_DEREF | 1208192895Sjamie PD_DEUREF | PD_LIST_XLOCKED); 1209192895Sjamie goto done_releroot; 1210191673Sjamie } 1211191673Sjamie jid++; 1212191673Sjamie goto findnext; 1213191673Sjamie } 1214191673Sjamie lastprid = jid; 1215191673Sjamie } else { 1216191673Sjamie /* 1217191673Sjamie * The jail already has a jid (that did not yet exist), 1218191673Sjamie * so just find where to insert it. 1219191673Sjamie */ 1220191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) 1221191673Sjamie if (tpr->pr_id >= jid) { 1222191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1223191673Sjamie break; 1224191673Sjamie } 1225191673Sjamie } 1226191673Sjamie if (tpr == NULL) 1227191673Sjamie TAILQ_INSERT_TAIL(&allprison, pr, pr_list); 1228192895Sjamie LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling); 1229192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 1230194762Sjamie tpr->pr_childcount++; 1231185435Sbz 1232192895Sjamie pr->pr_parent = ppr; 1233191673Sjamie pr->pr_id = jid; 1234192895Sjamie 1235192895Sjamie /* Set some default values, and inherit some from the parent. */ 1236191673Sjamie if (name == NULL) 1237191673Sjamie name = ""; 1238191673Sjamie if (path == NULL) { 1239191673Sjamie path = "/"; 1240192895Sjamie root = mypr->pr_root; 1241191673Sjamie vref(root); 1242191673Sjamie } 1243195944Sjamie strlcpy(pr->pr_hostuuid, DEFAULT_HOSTUUID, HOSTUUIDLEN); 1244195944Sjamie pr->pr_flags |= PR_HOST; 1245195945Sjamie#if defined(INET) || defined(INET6) 1246195945Sjamie#ifdef VIMAGE 1247195945Sjamie if (!(pr_flags & PR_VNET)) 1248195945Sjamie#endif 1249195945Sjamie { 1250192895Sjamie#ifdef INET 1251195974Sjamie if (!(ch_flags & PR_IP4_USER)) 1252195974Sjamie pr->pr_flags |= 1253195974Sjamie PR_IP4 | PR_IP4_USER | PR_IP4_DISABLE; 1254195974Sjamie else if (!(pr_flags & PR_IP4_USER)) { 1255195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP4; 1256195974Sjamie if (ppr->pr_ip4 != NULL) { 1257195974Sjamie pr->pr_ip4s = ppr->pr_ip4s; 1258195974Sjamie pr->pr_ip4 = malloc(pr->pr_ip4s * 1259195974Sjamie sizeof(struct in_addr), M_PRISON, 1260195974Sjamie M_WAITOK); 1261195974Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 1262195974Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1263195974Sjamie } 1264195974Sjamie } 1265192895Sjamie#endif 1266192895Sjamie#ifdef INET6 1267195974Sjamie if (!(ch_flags & PR_IP6_USER)) 1268195974Sjamie pr->pr_flags |= 1269195974Sjamie PR_IP6 | PR_IP6_USER | PR_IP6_DISABLE; 1270195974Sjamie else if (!(pr_flags & PR_IP6_USER)) { 1271195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP6; 1272195974Sjamie if (ppr->pr_ip6 != NULL) { 1273195974Sjamie pr->pr_ip6s = ppr->pr_ip6s; 1274195974Sjamie pr->pr_ip6 = malloc(pr->pr_ip6s * 1275195974Sjamie sizeof(struct in6_addr), M_PRISON, 1276195974Sjamie M_WAITOK); 1277195974Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 1278195974Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1279195974Sjamie } 1280195974Sjamie } 1281192895Sjamie#endif 1282195945Sjamie } 1283195945Sjamie#endif 1284202468Sbz /* Source address selection is always on by default. */ 1285202468Sbz pr->pr_flags |= _PR_IP_SADDRSEL; 1286202468Sbz 1287192895Sjamie pr->pr_securelevel = ppr->pr_securelevel; 1288192895Sjamie pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow; 1289196002Sjamie pr->pr_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 1290232059Smm pr->pr_devfs_rsnum = ppr->pr_devfs_rsnum; 1291191673Sjamie 1292192895Sjamie LIST_INIT(&pr->pr_children); 1293192895Sjamie mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK); 1294191673Sjamie 1295194251Sjamie#ifdef VIMAGE 1296194251Sjamie /* Allocate a new vnet if specified. */ 1297194251Sjamie pr->pr_vnet = (pr_flags & PR_VNET) 1298194251Sjamie ? vnet_alloc() : ppr->pr_vnet; 1299194251Sjamie#endif 1300185435Sbz /* 1301191673Sjamie * Allocate a dedicated cpuset for each jail. 1302191673Sjamie * Unlike other initial settings, this may return an erorr. 1303185435Sbz */ 1304192895Sjamie error = cpuset_create_root(ppr, &pr->pr_cpuset); 1305191673Sjamie if (error) { 1306191673Sjamie prison_deref(pr, PD_LIST_XLOCKED); 1307191673Sjamie goto done_releroot; 1308191673Sjamie } 1309185435Sbz 1310191673Sjamie mtx_lock(&pr->pr_mtx); 1311185435Sbz /* 1312191673Sjamie * New prisons do not yet have a reference, because we do not 1313191673Sjamie * want other to see the incomplete prison once the 1314191673Sjamie * allprison_lock is downgraded. 1315185435Sbz */ 1316191673Sjamie } else { 1317191673Sjamie created = 0; 1318195974Sjamie /* 1319195974Sjamie * Grab a reference for existing prisons, to ensure they 1320195974Sjamie * continue to exist for the duration of the call. 1321195974Sjamie */ 1322195974Sjamie pr->pr_ref++; 1323195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 1324195945Sjamie if ((pr->pr_flags & PR_VNET) && 1325195945Sjamie (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 1326195945Sjamie error = EINVAL; 1327195945Sjamie vfs_opterror(opts, 1328195945Sjamie "vnet jails cannot have IP address restrictions"); 1329195945Sjamie goto done_deref_locked; 1330195945Sjamie } 1331195945Sjamie#endif 1332195974Sjamie#ifdef INET 1333195974Sjamie if (PR_IP4_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1334195974Sjamie error = EINVAL; 1335195974Sjamie vfs_opterror(opts, 1336195974Sjamie "ip4 cannot be changed after creation"); 1337195974Sjamie goto done_deref_locked; 1338195974Sjamie } 1339195974Sjamie#endif 1340195974Sjamie#ifdef INET6 1341195974Sjamie if (PR_IP6_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1342195974Sjamie error = EINVAL; 1343195974Sjamie vfs_opterror(opts, 1344195974Sjamie "ip6 cannot be changed after creation"); 1345195974Sjamie goto done_deref_locked; 1346195974Sjamie } 1347195974Sjamie#endif 1348191673Sjamie } 1349185435Sbz 1350191673Sjamie /* Do final error checking before setting anything. */ 1351192895Sjamie if (gotslevel) { 1352192895Sjamie if (slevel < ppr->pr_securelevel) { 1353192895Sjamie error = EPERM; 1354192895Sjamie goto done_deref_locked; 1355192895Sjamie } 1356192895Sjamie } 1357194762Sjamie if (gotchildmax) { 1358194762Sjamie if (childmax >= ppr->pr_childmax) { 1359194762Sjamie error = EPERM; 1360194762Sjamie goto done_deref_locked; 1361194762Sjamie } 1362194762Sjamie } 1363192895Sjamie if (gotenforce) { 1364192895Sjamie if (enforce < ppr->pr_enforce_statfs) { 1365192895Sjamie error = EPERM; 1366192895Sjamie goto done_deref_locked; 1367192895Sjamie } 1368192895Sjamie } 1369231267Smm if (gotrsnum) { 1370231267Smm /* 1371231267Smm * devfs_rsnum is a uint16_t 1372231267Smm */ 1373232059Smm if (rsnum < 0 || rsnum > 65535) { 1374231267Smm error = EINVAL; 1375231267Smm goto done_deref_locked; 1376231267Smm } 1377231267Smm /* 1378232059Smm * Nested jails always inherit parent's devfs ruleset 1379231267Smm */ 1380231267Smm if (jailed(td->td_ucred)) { 1381231267Smm if (rsnum > 0 && rsnum != ppr->pr_devfs_rsnum) { 1382231267Smm error = EPERM; 1383231267Smm goto done_deref_locked; 1384232059Smm } else 1385231267Smm rsnum = ppr->pr_devfs_rsnum; 1386231267Smm } 1387231267Smm } 1388185435Sbz#ifdef INET 1389195974Sjamie if (ip4s > 0) { 1390192895Sjamie if (ppr->pr_flags & PR_IP4) { 1391195974Sjamie /* 1392195974Sjamie * Make sure the new set of IP addresses is a 1393195974Sjamie * subset of the parent's list. Don't worry 1394195974Sjamie * about the parent being unlocked, as any 1395195974Sjamie * setting is done with allprison_lock held. 1396195974Sjamie */ 1397195974Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 1398195974Sjamie if (ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 1399195974Sjamie break; 1400195974Sjamie if (ij == ppr->pr_ip4s) { 1401195974Sjamie error = EPERM; 1402195974Sjamie goto done_deref_locked; 1403195974Sjamie } 1404195974Sjamie if (ip4s > 1) { 1405195974Sjamie for (ii = ij = 1; ii < ip4s; ii++) { 1406195974Sjamie if (ip4[ii].s_addr == 1407195974Sjamie ppr->pr_ip4[0].s_addr) 1408195974Sjamie continue; 1409195974Sjamie for (; ij < ppr->pr_ip4s; ij++) 1410195974Sjamie if (ip4[ii].s_addr == 1411195974Sjamie ppr->pr_ip4[ij].s_addr) 1412195974Sjamie break; 1413195974Sjamie if (ij == ppr->pr_ip4s) 1414195974Sjamie break; 1415192895Sjamie } 1416192895Sjamie if (ij == ppr->pr_ip4s) { 1417192895Sjamie error = EPERM; 1418192895Sjamie goto done_deref_locked; 1419192895Sjamie } 1420192895Sjamie } 1421192895Sjamie } 1422195974Sjamie /* 1423195974Sjamie * Check for conflicting IP addresses. We permit them 1424195974Sjamie * if there is no more than one IP on each jail. If 1425195974Sjamie * there is a duplicate on a jail with more than one 1426195974Sjamie * IP stop checking and return error. 1427195974Sjamie */ 1428195974Sjamie tppr = ppr; 1429195945Sjamie#ifdef VIMAGE 1430195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1431195974Sjamie if (tppr->pr_flags & PR_VNET) 1432195974Sjamie break; 1433195945Sjamie#endif 1434195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1435195974Sjamie if (tpr == pr || 1436195945Sjamie#ifdef VIMAGE 1437195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1438195945Sjamie#endif 1439195974Sjamie tpr->pr_uref == 0) { 1440192895Sjamie descend = 0; 1441195974Sjamie continue; 1442195974Sjamie } 1443195974Sjamie if (!(tpr->pr_flags & PR_IP4_USER)) 1444195974Sjamie continue; 1445195974Sjamie descend = 0; 1446195974Sjamie if (tpr->pr_ip4 == NULL || 1447195974Sjamie (ip4s == 1 && tpr->pr_ip4s == 1)) 1448195974Sjamie continue; 1449195974Sjamie for (ii = 0; ii < ip4s; ii++) { 1450195974Sjamie if (_prison_check_ip4(tpr, &ip4[ii]) == 0) { 1451195974Sjamie error = EADDRINUSE; 1452195974Sjamie vfs_opterror(opts, 1453195974Sjamie "IPv4 addresses clash"); 1454195974Sjamie goto done_deref_locked; 1455192895Sjamie } 1456192895Sjamie } 1457192895Sjamie } 1458192895Sjamie } 1459185435Sbz#endif 1460191673Sjamie#ifdef INET6 1461195974Sjamie if (ip6s > 0) { 1462192895Sjamie if (ppr->pr_flags & PR_IP6) { 1463195974Sjamie /* 1464195974Sjamie * Make sure the new set of IP addresses is a 1465195974Sjamie * subset of the parent's list. 1466195974Sjamie */ 1467195974Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 1468195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[0], 1469195974Sjamie &ppr->pr_ip6[ij])) 1470195974Sjamie break; 1471195974Sjamie if (ij == ppr->pr_ip6s) { 1472195974Sjamie error = EPERM; 1473195974Sjamie goto done_deref_locked; 1474195974Sjamie } 1475195974Sjamie if (ip6s > 1) { 1476195974Sjamie for (ii = ij = 1; ii < ip6s; ii++) { 1477195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[ii], 1478195974Sjamie &ppr->pr_ip6[0])) 1479195974Sjamie continue; 1480195974Sjamie for (; ij < ppr->pr_ip6s; ij++) 1481195974Sjamie if (IN6_ARE_ADDR_EQUAL( 1482195974Sjamie &ip6[ii], &ppr->pr_ip6[ij])) 1483195974Sjamie break; 1484195974Sjamie if (ij == ppr->pr_ip6s) 1485195974Sjamie break; 1486192895Sjamie } 1487192895Sjamie if (ij == ppr->pr_ip6s) { 1488192895Sjamie error = EPERM; 1489192895Sjamie goto done_deref_locked; 1490192895Sjamie } 1491192895Sjamie } 1492192895Sjamie } 1493195974Sjamie /* Check for conflicting IP addresses. */ 1494195974Sjamie tppr = ppr; 1495195945Sjamie#ifdef VIMAGE 1496195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1497195974Sjamie if (tppr->pr_flags & PR_VNET) 1498195974Sjamie break; 1499195945Sjamie#endif 1500195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1501195974Sjamie if (tpr == pr || 1502195945Sjamie#ifdef VIMAGE 1503195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1504195945Sjamie#endif 1505195974Sjamie tpr->pr_uref == 0) { 1506192895Sjamie descend = 0; 1507195974Sjamie continue; 1508195974Sjamie } 1509195974Sjamie if (!(tpr->pr_flags & PR_IP6_USER)) 1510195974Sjamie continue; 1511195974Sjamie descend = 0; 1512195974Sjamie if (tpr->pr_ip6 == NULL || 1513195974Sjamie (ip6s == 1 && tpr->pr_ip6s == 1)) 1514195974Sjamie continue; 1515195974Sjamie for (ii = 0; ii < ip6s; ii++) { 1516195974Sjamie if (_prison_check_ip6(tpr, &ip6[ii]) == 0) { 1517195974Sjamie error = EADDRINUSE; 1518195974Sjamie vfs_opterror(opts, 1519195974Sjamie "IPv6 addresses clash"); 1520195974Sjamie goto done_deref_locked; 1521192895Sjamie } 1522192895Sjamie } 1523191673Sjamie } 1524192895Sjamie } 1525191673Sjamie#endif 1526192895Sjamie onamelen = namelen = 0; 1527192895Sjamie if (name != NULL) { 1528191673Sjamie /* Give a default name of the jid. */ 1529191673Sjamie if (name[0] == '\0') 1530191673Sjamie snprintf(name = numbuf, sizeof(numbuf), "%d", jid); 1531196835Sjamie else if (*namelc == '0' || (strtoul(namelc, &p, 10) != jid && 1532196835Sjamie *p == '\0')) { 1533191673Sjamie error = EINVAL; 1534196835Sjamie vfs_opterror(opts, 1535196835Sjamie "name cannot be numeric (unless it is the jid)"); 1536192895Sjamie goto done_deref_locked; 1537191673Sjamie } 1538191673Sjamie /* 1539192895Sjamie * Make sure the name isn't too long for the prison or its 1540192895Sjamie * children. 1541191673Sjamie */ 1542192895Sjamie onamelen = strlen(pr->pr_name); 1543192895Sjamie namelen = strlen(name); 1544192895Sjamie if (strlen(ppr->pr_name) + namelen + 2 > sizeof(pr->pr_name)) { 1545192895Sjamie error = ENAMETOOLONG; 1546192895Sjamie goto done_deref_locked; 1547192895Sjamie } 1548192895Sjamie FOREACH_PRISON_DESCENDANT(pr, tpr, descend) { 1549192895Sjamie if (strlen(tpr->pr_name) + (namelen - onamelen) >= 1550192895Sjamie sizeof(pr->pr_name)) { 1551192895Sjamie error = ENAMETOOLONG; 1552192895Sjamie goto done_deref_locked; 1553192895Sjamie } 1554192895Sjamie } 1555191673Sjamie } 1556192895Sjamie if (pr_allow & ~ppr->pr_allow) { 1557192895Sjamie error = EPERM; 1558192895Sjamie goto done_deref_locked; 1559192895Sjamie } 1560185435Sbz 1561191673Sjamie /* Set the parameters of the prison. */ 1562191673Sjamie#ifdef INET 1563192895Sjamie redo_ip4 = 0; 1564195974Sjamie if (pr_flags & PR_IP4_USER) { 1565195974Sjamie pr->pr_flags |= PR_IP4; 1566195974Sjamie free(pr->pr_ip4, M_PRISON); 1567195974Sjamie pr->pr_ip4s = ip4s; 1568195974Sjamie pr->pr_ip4 = ip4; 1569195974Sjamie ip4 = NULL; 1570192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1571195945Sjamie#ifdef VIMAGE 1572195945Sjamie if (tpr->pr_flags & PR_VNET) { 1573195945Sjamie descend = 0; 1574195945Sjamie continue; 1575195945Sjamie } 1576195945Sjamie#endif 1577192895Sjamie if (prison_restrict_ip4(tpr, NULL)) { 1578192895Sjamie redo_ip4 = 1; 1579192895Sjamie descend = 0; 1580192895Sjamie } 1581192895Sjamie } 1582185435Sbz } 1583191673Sjamie#endif 1584191673Sjamie#ifdef INET6 1585192895Sjamie redo_ip6 = 0; 1586195974Sjamie if (pr_flags & PR_IP6_USER) { 1587195974Sjamie pr->pr_flags |= PR_IP6; 1588195974Sjamie free(pr->pr_ip6, M_PRISON); 1589195974Sjamie pr->pr_ip6s = ip6s; 1590195974Sjamie pr->pr_ip6 = ip6; 1591195974Sjamie ip6 = NULL; 1592192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1593195945Sjamie#ifdef VIMAGE 1594195945Sjamie if (tpr->pr_flags & PR_VNET) { 1595195945Sjamie descend = 0; 1596195945Sjamie continue; 1597195945Sjamie } 1598195945Sjamie#endif 1599192895Sjamie if (prison_restrict_ip6(tpr, NULL)) { 1600192895Sjamie redo_ip6 = 1; 1601192895Sjamie descend = 0; 1602192895Sjamie } 1603192895Sjamie } 1604191673Sjamie } 1605191673Sjamie#endif 1606192895Sjamie if (gotslevel) { 1607191673Sjamie pr->pr_securelevel = slevel; 1608192895Sjamie /* Set all child jails to be at least this level. */ 1609192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1610192895Sjamie if (tpr->pr_securelevel < slevel) 1611192895Sjamie tpr->pr_securelevel = slevel; 1612192895Sjamie } 1613194762Sjamie if (gotchildmax) { 1614194762Sjamie pr->pr_childmax = childmax; 1615194762Sjamie /* Set all child jails to under this limit. */ 1616194762Sjamie FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level) 1617194762Sjamie if (tpr->pr_childmax > childmax - level) 1618194762Sjamie tpr->pr_childmax = childmax > level 1619194762Sjamie ? childmax - level : 0; 1620194762Sjamie } 1621192895Sjamie if (gotenforce) { 1622192895Sjamie pr->pr_enforce_statfs = enforce; 1623192895Sjamie /* Pass this restriction on to the children. */ 1624192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1625192895Sjamie if (tpr->pr_enforce_statfs < enforce) 1626192895Sjamie tpr->pr_enforce_statfs = enforce; 1627192895Sjamie } 1628231267Smm if (gotrsnum) { 1629231267Smm pr->pr_devfs_rsnum = rsnum; 1630231267Smm /* Pass this restriction on to the children. */ 1631231267Smm FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1632232059Smm tpr->pr_devfs_rsnum = rsnum; 1633231267Smm } 1634192895Sjamie if (name != NULL) { 1635192895Sjamie if (ppr == &prison0) 1636192895Sjamie strlcpy(pr->pr_name, name, sizeof(pr->pr_name)); 1637192895Sjamie else 1638192895Sjamie snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s", 1639192895Sjamie ppr->pr_name, name); 1640192895Sjamie /* Change this component of child names. */ 1641192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1642192895Sjamie bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen, 1643192895Sjamie strlen(tpr->pr_name + onamelen) + 1); 1644192895Sjamie bcopy(pr->pr_name, tpr->pr_name, namelen); 1645192895Sjamie } 1646192895Sjamie } 1647191673Sjamie if (path != NULL) { 1648192895Sjamie /* Try to keep a real-rooted full pathname. */ 1649230129Smm if (fullpath_disabled && path[0] == '/' && 1650230129Smm strcmp(mypr->pr_path, "/")) 1651192895Sjamie snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s", 1652192895Sjamie mypr->pr_path, path); 1653192895Sjamie else 1654192895Sjamie strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); 1655191673Sjamie pr->pr_root = root; 1656191673Sjamie } 1657193066Sjamie if (PR_HOST & ch_flags & ~pr_flags) { 1658193066Sjamie if (pr->pr_flags & PR_HOST) { 1659193066Sjamie /* 1660193066Sjamie * Copy the parent's host info. As with pr_ip4 above, 1661193066Sjamie * the lack of a lock on the parent is not a problem; 1662193066Sjamie * it is always set with allprison_lock at least 1663193066Sjamie * shared, and is held exclusively here. 1664193066Sjamie */ 1665194118Sjamie strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname, 1666194118Sjamie sizeof(pr->pr_hostname)); 1667194118Sjamie strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname, 1668194118Sjamie sizeof(pr->pr_domainname)); 1669194118Sjamie strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid, 1670194118Sjamie sizeof(pr->pr_hostuuid)); 1671193066Sjamie pr->pr_hostid = pr->pr_parent->pr_hostid; 1672193066Sjamie } 1673193066Sjamie } else if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1674193066Sjamie /* Set this prison, and any descendants without PR_HOST. */ 1675193066Sjamie if (host != NULL) 1676194118Sjamie strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname)); 1677193066Sjamie if (domain != NULL) 1678194118Sjamie strlcpy(pr->pr_domainname, domain, 1679194118Sjamie sizeof(pr->pr_domainname)); 1680193066Sjamie if (uuid != NULL) 1681194118Sjamie strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid)); 1682193066Sjamie if (gothid) 1683193066Sjamie pr->pr_hostid = hid; 1684193066Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1685193066Sjamie if (tpr->pr_flags & PR_HOST) 1686193066Sjamie descend = 0; 1687193066Sjamie else { 1688193066Sjamie if (host != NULL) 1689194118Sjamie strlcpy(tpr->pr_hostname, 1690194118Sjamie pr->pr_hostname, 1691194118Sjamie sizeof(tpr->pr_hostname)); 1692193066Sjamie if (domain != NULL) 1693194118Sjamie strlcpy(tpr->pr_domainname, 1694194118Sjamie pr->pr_domainname, 1695194118Sjamie sizeof(tpr->pr_domainname)); 1696193066Sjamie if (uuid != NULL) 1697194118Sjamie strlcpy(tpr->pr_hostuuid, 1698194118Sjamie pr->pr_hostuuid, 1699194118Sjamie sizeof(tpr->pr_hostuuid)); 1700193066Sjamie if (gothid) 1701193066Sjamie tpr->pr_hostid = hid; 1702193066Sjamie } 1703193066Sjamie } 1704193066Sjamie } 1705192895Sjamie if ((tallow = ch_allow & ~pr_allow)) { 1706192895Sjamie /* Clear allow bits in all children. */ 1707192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1708192895Sjamie tpr->pr_allow &= ~tallow; 1709192895Sjamie } 1710192895Sjamie pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow; 1711191673Sjamie /* 1712191673Sjamie * Persistent prisons get an extra reference, and prisons losing their 1713191673Sjamie * persist flag lose that reference. Only do this for existing prisons 1714191673Sjamie * for now, so new ones will remain unseen until after the module 1715191673Sjamie * handlers have completed. 1716191673Sjamie */ 1717191673Sjamie if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { 1718191673Sjamie if (pr_flags & PR_PERSIST) { 1719191673Sjamie pr->pr_ref++; 1720191673Sjamie pr->pr_uref++; 1721191673Sjamie } else { 1722191673Sjamie pr->pr_ref--; 1723191673Sjamie pr->pr_uref--; 1724191673Sjamie } 1725191673Sjamie } 1726191673Sjamie pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; 1727191673Sjamie mtx_unlock(&pr->pr_mtx); 1728185435Sbz 1729221362Strasz#ifdef RACCT 1730221362Strasz if (created) 1731221362Strasz prison_racct_attach(pr); 1732221362Strasz#endif 1733221362Strasz 1734192895Sjamie /* Locks may have prevented a complete restriction of child IP 1735192895Sjamie * addresses. If so, allocate some more memory and try again. 1736192895Sjamie */ 1737192895Sjamie#ifdef INET 1738192895Sjamie while (redo_ip4) { 1739192895Sjamie ip4s = pr->pr_ip4s; 1740192895Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 1741192895Sjamie mtx_lock(&pr->pr_mtx); 1742192895Sjamie redo_ip4 = 0; 1743192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1744195945Sjamie#ifdef VIMAGE 1745195945Sjamie if (tpr->pr_flags & PR_VNET) { 1746195945Sjamie descend = 0; 1747195945Sjamie continue; 1748195945Sjamie } 1749195945Sjamie#endif 1750192895Sjamie if (prison_restrict_ip4(tpr, ip4)) { 1751192895Sjamie if (ip4 != NULL) 1752192895Sjamie ip4 = NULL; 1753192895Sjamie else 1754192895Sjamie redo_ip4 = 1; 1755192895Sjamie } 1756192895Sjamie } 1757192895Sjamie mtx_unlock(&pr->pr_mtx); 1758192895Sjamie } 1759192895Sjamie#endif 1760192895Sjamie#ifdef INET6 1761192895Sjamie while (redo_ip6) { 1762192895Sjamie ip6s = pr->pr_ip6s; 1763192895Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 1764192895Sjamie mtx_lock(&pr->pr_mtx); 1765192895Sjamie redo_ip6 = 0; 1766192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1767195945Sjamie#ifdef VIMAGE 1768195945Sjamie if (tpr->pr_flags & PR_VNET) { 1769195945Sjamie descend = 0; 1770195945Sjamie continue; 1771195945Sjamie } 1772195945Sjamie#endif 1773192895Sjamie if (prison_restrict_ip6(tpr, ip6)) { 1774192895Sjamie if (ip6 != NULL) 1775192895Sjamie ip6 = NULL; 1776192895Sjamie else 1777192895Sjamie redo_ip6 = 1; 1778192895Sjamie } 1779192895Sjamie } 1780192895Sjamie mtx_unlock(&pr->pr_mtx); 1781192895Sjamie } 1782192895Sjamie#endif 1783192895Sjamie 1784191673Sjamie /* Let the modules do their work. */ 1785191673Sjamie sx_downgrade(&allprison_lock); 1786191673Sjamie if (created) { 1787191673Sjamie error = osd_jail_call(pr, PR_METHOD_CREATE, opts); 1788191673Sjamie if (error) { 1789191673Sjamie prison_deref(pr, PD_LIST_SLOCKED); 1790191673Sjamie goto done_errmsg; 1791191673Sjamie } 1792191673Sjamie } 1793191673Sjamie error = osd_jail_call(pr, PR_METHOD_SET, opts); 1794191673Sjamie if (error) { 1795191673Sjamie prison_deref(pr, created 1796191673Sjamie ? PD_LIST_SLOCKED 1797191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1798191673Sjamie goto done_errmsg; 1799191673Sjamie } 1800191673Sjamie 1801191673Sjamie /* Attach this process to the prison if requested. */ 1802191673Sjamie if (flags & JAIL_ATTACH) { 1803191673Sjamie mtx_lock(&pr->pr_mtx); 1804191673Sjamie error = do_jail_attach(td, pr); 1805191673Sjamie if (error) { 1806191673Sjamie vfs_opterror(opts, "attach failed"); 1807191673Sjamie if (!created) 1808191673Sjamie prison_deref(pr, PD_DEREF); 1809191673Sjamie goto done_errmsg; 1810191673Sjamie } 1811191673Sjamie } 1812191673Sjamie 1813191673Sjamie /* 1814191673Sjamie * Now that it is all there, drop the temporary reference from existing 1815191673Sjamie * prisons. Or add a reference to newly created persistent prisons 1816191673Sjamie * (which was not done earlier so that the prison would not be publicly 1817191673Sjamie * visible). 1818191673Sjamie */ 1819191673Sjamie if (!created) { 1820191673Sjamie prison_deref(pr, (flags & JAIL_ATTACH) 1821191673Sjamie ? PD_DEREF 1822191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1823191673Sjamie } else { 1824191673Sjamie if (pr_flags & PR_PERSIST) { 1825191673Sjamie mtx_lock(&pr->pr_mtx); 1826191673Sjamie pr->pr_ref++; 1827191673Sjamie pr->pr_uref++; 1828191673Sjamie mtx_unlock(&pr->pr_mtx); 1829191673Sjamie } 1830191673Sjamie if (!(flags & JAIL_ATTACH)) 1831191673Sjamie sx_sunlock(&allprison_lock); 1832191673Sjamie } 1833191673Sjamie td->td_retval[0] = pr->pr_id; 1834191673Sjamie goto done_errmsg; 1835191673Sjamie 1836192895Sjamie done_deref_locked: 1837192895Sjamie prison_deref(pr, created 1838192895Sjamie ? PD_LOCKED | PD_LIST_XLOCKED 1839192895Sjamie : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 1840192895Sjamie goto done_releroot; 1841191673Sjamie done_unlock_list: 1842191673Sjamie sx_xunlock(&allprison_lock); 1843191673Sjamie done_releroot: 1844191673Sjamie if (root != NULL) { 1845191673Sjamie vfslocked = VFS_LOCK_GIANT(root->v_mount); 1846191673Sjamie vrele(root); 1847191673Sjamie VFS_UNLOCK_GIANT(vfslocked); 1848191673Sjamie } 1849191673Sjamie done_errmsg: 1850191673Sjamie if (error) { 1851191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 1852191673Sjamie if (errmsg_len > 0) { 1853191673Sjamie errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; 1854191673Sjamie if (errmsg_pos > 0) { 1855191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 1856191673Sjamie bcopy(errmsg, 1857191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1858191673Sjamie errmsg_len); 1859191673Sjamie else 1860191673Sjamie copyout(errmsg, 1861191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1862191673Sjamie errmsg_len); 1863191673Sjamie } 1864191673Sjamie } 1865191673Sjamie } 1866191673Sjamie done_free: 1867191673Sjamie#ifdef INET 1868191673Sjamie free(ip4, M_PRISON); 1869191673Sjamie#endif 1870191673Sjamie#ifdef INET6 1871191673Sjamie free(ip6, M_PRISON); 1872191673Sjamie#endif 1873230407Smm if (g_path != NULL) 1874230407Smm free(g_path, M_TEMP); 1875191673Sjamie vfs_freeopts(opts); 1876191673Sjamie return (error); 1877191673Sjamie} 1878191673Sjamie 1879191673Sjamie 188082710Sdillon/* 1881191673Sjamie * struct jail_get_args { 1882191673Sjamie * struct iovec *iovp; 1883191673Sjamie * unsigned int iovcnt; 1884191673Sjamie * int flags; 1885114168Smike * }; 188682710Sdillon */ 188746155Sphkint 1888225617Skmacysys_jail_get(struct thread *td, struct jail_get_args *uap) 188946155Sphk{ 1890191673Sjamie struct uio *auio; 1891185435Sbz int error; 1892185435Sbz 1893191673Sjamie /* Check that we have an even number of iovecs. */ 1894191673Sjamie if (uap->iovcnt & 1) 1895191673Sjamie return (EINVAL); 1896191673Sjamie 1897191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 1898185435Sbz if (error) 1899185435Sbz return (error); 1900191673Sjamie error = kern_jail_get(td, auio, uap->flags); 1901191673Sjamie if (error == 0) 1902191673Sjamie error = copyout(auio->uio_iov, uap->iovp, 1903191673Sjamie uap->iovcnt * sizeof (struct iovec)); 1904191673Sjamie free(auio, M_IOV); 1905191673Sjamie return (error); 1906191673Sjamie} 1907185435Sbz 1908191673Sjamieint 1909191673Sjamiekern_jail_get(struct thread *td, struct uio *optuio, int flags) 1910191673Sjamie{ 1911192895Sjamie struct prison *pr, *mypr; 1912191673Sjamie struct vfsopt *opt; 1913191673Sjamie struct vfsoptlist *opts; 1914191673Sjamie char *errmsg, *name; 1915192895Sjamie int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos; 1916185435Sbz 1917191673Sjamie if (flags & ~JAIL_GET_MASK) 1918191673Sjamie return (EINVAL); 1919185435Sbz 1920191673Sjamie /* Get the parameter list. */ 1921191673Sjamie error = vfs_buildopts(optuio, &opts); 1922191673Sjamie if (error) 1923191673Sjamie return (error); 1924191673Sjamie errmsg_pos = vfs_getopt_pos(opts, "errmsg"); 1925192895Sjamie mypr = td->td_ucred->cr_prison; 1926185435Sbz 1927191673Sjamie /* 1928191673Sjamie * Find the prison specified by one of: lastjid, jid, name. 1929191673Sjamie */ 1930191673Sjamie sx_slock(&allprison_lock); 1931191673Sjamie error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); 1932191673Sjamie if (error == 0) { 1933191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 1934192895Sjamie if (pr->pr_id > jid && prison_ischild(mypr, pr)) { 1935191673Sjamie mtx_lock(&pr->pr_mtx); 1936191673Sjamie if (pr->pr_ref > 0 && 1937191673Sjamie (pr->pr_uref > 0 || (flags & JAIL_DYING))) 1938191673Sjamie break; 1939191673Sjamie mtx_unlock(&pr->pr_mtx); 1940191673Sjamie } 1941191673Sjamie } 1942191673Sjamie if (pr != NULL) 1943191673Sjamie goto found_prison; 1944191673Sjamie error = ENOENT; 1945191673Sjamie vfs_opterror(opts, "no jail after %d", jid); 1946191673Sjamie goto done_unlock_list; 1947191673Sjamie } else if (error != ENOENT) 1948191673Sjamie goto done_unlock_list; 1949185435Sbz 1950191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 1951191673Sjamie if (error == 0) { 1952191673Sjamie if (jid != 0) { 1953192895Sjamie pr = prison_find_child(mypr, jid); 1954191673Sjamie if (pr != NULL) { 1955191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1956191673Sjamie mtx_unlock(&pr->pr_mtx); 1957191673Sjamie error = ENOENT; 1958191673Sjamie vfs_opterror(opts, "jail %d is dying", 1959191673Sjamie jid); 1960191673Sjamie goto done_unlock_list; 1961191673Sjamie } 1962191673Sjamie goto found_prison; 1963191673Sjamie } 1964191673Sjamie error = ENOENT; 1965191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1966191673Sjamie goto done_unlock_list; 1967191673Sjamie } 1968191673Sjamie } else if (error != ENOENT) 1969191673Sjamie goto done_unlock_list; 197046155Sphk 1971191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 1972191673Sjamie if (error == 0) { 1973191673Sjamie if (len == 0 || name[len - 1] != '\0') { 1974191673Sjamie error = EINVAL; 1975191673Sjamie goto done_unlock_list; 1976191673Sjamie } 1977192895Sjamie pr = prison_find_name(mypr, name); 1978191673Sjamie if (pr != NULL) { 1979191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 1980191673Sjamie mtx_unlock(&pr->pr_mtx); 1981191673Sjamie error = ENOENT; 1982191673Sjamie vfs_opterror(opts, "jail \"%s\" is dying", 1983191673Sjamie name); 1984191673Sjamie goto done_unlock_list; 1985191673Sjamie } 1986191673Sjamie goto found_prison; 1987191673Sjamie } 1988191673Sjamie error = ENOENT; 1989191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", name); 1990191673Sjamie goto done_unlock_list; 1991191673Sjamie } else if (error != ENOENT) 1992191673Sjamie goto done_unlock_list; 1993185435Sbz 1994191673Sjamie vfs_opterror(opts, "no jail specified"); 1995191673Sjamie error = ENOENT; 1996191673Sjamie goto done_unlock_list; 1997191673Sjamie 1998191673Sjamie found_prison: 1999191673Sjamie /* Get the parameters of the prison. */ 2000191673Sjamie pr->pr_ref++; 2001191673Sjamie locked = PD_LOCKED; 2002191673Sjamie td->td_retval[0] = pr->pr_id; 2003191673Sjamie error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); 2004191673Sjamie if (error != 0 && error != ENOENT) 2005191673Sjamie goto done_deref; 2006192895Sjamie i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id; 2007192895Sjamie error = vfs_setopt(opts, "parent", &i, sizeof(i)); 2008191673Sjamie if (error != 0 && error != ENOENT) 2009191673Sjamie goto done_deref; 2010192895Sjamie error = vfs_setopts(opts, "name", prison_name(mypr, pr)); 2011192895Sjamie if (error != 0 && error != ENOENT) 2012192895Sjamie goto done_deref; 2013192895Sjamie error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id, 2014191673Sjamie sizeof(pr->pr_cpuset->cs_id)); 2015191673Sjamie if (error != 0 && error != ENOENT) 2016191673Sjamie goto done_deref; 2017192895Sjamie error = vfs_setopts(opts, "path", prison_path(mypr, pr)); 2018191673Sjamie if (error != 0 && error != ENOENT) 2019191673Sjamie goto done_deref; 2020191673Sjamie#ifdef INET 2021191673Sjamie error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, 2022191673Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2023191673Sjamie if (error != 0 && error != ENOENT) 2024191673Sjamie goto done_deref; 2025191673Sjamie#endif 2026191673Sjamie#ifdef INET6 2027191673Sjamie error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, 2028191673Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 2029191673Sjamie if (error != 0 && error != ENOENT) 2030191673Sjamie goto done_deref; 2031191673Sjamie#endif 2032191673Sjamie error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, 2033191673Sjamie sizeof(pr->pr_securelevel)); 2034191673Sjamie if (error != 0 && error != ENOENT) 2035191673Sjamie goto done_deref; 2036194762Sjamie error = vfs_setopt(opts, "children.cur", &pr->pr_childcount, 2037194762Sjamie sizeof(pr->pr_childcount)); 2038194762Sjamie if (error != 0 && error != ENOENT) 2039194762Sjamie goto done_deref; 2040194762Sjamie error = vfs_setopt(opts, "children.max", &pr->pr_childmax, 2041194762Sjamie sizeof(pr->pr_childmax)); 2042194762Sjamie if (error != 0 && error != ENOENT) 2043194762Sjamie goto done_deref; 2044194118Sjamie error = vfs_setopts(opts, "host.hostname", pr->pr_hostname); 2045191673Sjamie if (error != 0 && error != ENOENT) 2046191673Sjamie goto done_deref; 2047194118Sjamie error = vfs_setopts(opts, "host.domainname", pr->pr_domainname); 2048193066Sjamie if (error != 0 && error != ENOENT) 2049193066Sjamie goto done_deref; 2050194118Sjamie error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid); 2051193066Sjamie if (error != 0 && error != ENOENT) 2052193066Sjamie goto done_deref; 2053205014Snwhitehorn#ifdef COMPAT_FREEBSD32 2054217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 2055193066Sjamie uint32_t hid32 = pr->pr_hostid; 2056193066Sjamie 2057193066Sjamie error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32)); 2058193066Sjamie } else 2059193066Sjamie#endif 2060193066Sjamie error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid, 2061193066Sjamie sizeof(pr->pr_hostid)); 2062193066Sjamie if (error != 0 && error != ENOENT) 2063193066Sjamie goto done_deref; 2064192895Sjamie error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs, 2065192895Sjamie sizeof(pr->pr_enforce_statfs)); 2066191673Sjamie if (error != 0 && error != ENOENT) 2067191673Sjamie goto done_deref; 2068231267Smm error = vfs_setopt(opts, "devfs_ruleset", &pr->pr_devfs_rsnum, 2069231267Smm sizeof(pr->pr_devfs_rsnum)); 2070231267Smm if (error != 0 && error != ENOENT) 2071231267Smm goto done_deref; 2072192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 2073192895Sjamie fi++) { 2074192895Sjamie if (pr_flag_names[fi] == NULL) 2075192895Sjamie continue; 2076192895Sjamie i = (pr->pr_flags & (1 << fi)) ? 1 : 0; 2077192895Sjamie error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i)); 2078192895Sjamie if (error != 0 && error != ENOENT) 2079192895Sjamie goto done_deref; 2080192895Sjamie i = !i; 2081192895Sjamie error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i)); 2082192895Sjamie if (error != 0 && error != ENOENT) 2083192895Sjamie goto done_deref; 2084192895Sjamie } 2085195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 2086195870Sjamie fi++) { 2087195870Sjamie i = pr->pr_flags & 2088195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 2089195870Sjamie i = pr_flag_jailsys[fi].disable && 2090195870Sjamie (i == pr_flag_jailsys[fi].disable) ? JAIL_SYS_DISABLE 2091195870Sjamie : (i == pr_flag_jailsys[fi].new) ? JAIL_SYS_NEW 2092195870Sjamie : JAIL_SYS_INHERIT; 2093195870Sjamie error = 2094195870Sjamie vfs_setopt(opts, pr_flag_jailsys[fi].name, &i, sizeof(i)); 2095195870Sjamie if (error != 0 && error != ENOENT) 2096195870Sjamie goto done_deref; 2097195870Sjamie } 2098192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 2099192895Sjamie fi++) { 2100192895Sjamie if (pr_allow_names[fi] == NULL) 2101192895Sjamie continue; 2102192895Sjamie i = (pr->pr_allow & (1 << fi)) ? 1 : 0; 2103192895Sjamie error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i)); 2104192895Sjamie if (error != 0 && error != ENOENT) 2105192895Sjamie goto done_deref; 2106192895Sjamie i = !i; 2107192895Sjamie error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i)); 2108192895Sjamie if (error != 0 && error != ENOENT) 2109192895Sjamie goto done_deref; 2110192895Sjamie } 2111191673Sjamie i = (pr->pr_uref == 0); 2112191673Sjamie error = vfs_setopt(opts, "dying", &i, sizeof(i)); 2113191673Sjamie if (error != 0 && error != ENOENT) 2114191673Sjamie goto done_deref; 2115191673Sjamie i = !i; 2116191673Sjamie error = vfs_setopt(opts, "nodying", &i, sizeof(i)); 2117191673Sjamie if (error != 0 && error != ENOENT) 2118191673Sjamie goto done_deref; 2119191673Sjamie 2120191673Sjamie /* Get the module parameters. */ 2121191673Sjamie mtx_unlock(&pr->pr_mtx); 2122191673Sjamie locked = 0; 2123191673Sjamie error = osd_jail_call(pr, PR_METHOD_GET, opts); 212446155Sphk if (error) 2125191673Sjamie goto done_deref; 2126191673Sjamie prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); 212784828Sjhb 2128191673Sjamie /* By now, all parameters should have been noted. */ 2129191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2130191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 2131191673Sjamie error = EINVAL; 2132191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 2133191673Sjamie goto done_errmsg; 2134191673Sjamie } 2135185435Sbz } 2136191673Sjamie 2137191673Sjamie /* Write the fetched parameters back to userspace. */ 2138191673Sjamie error = 0; 2139191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2140191673Sjamie if (opt->pos >= 0 && opt->pos != errmsg_pos) { 2141191673Sjamie pos = 2 * opt->pos + 1; 2142191673Sjamie optuio->uio_iov[pos].iov_len = opt->len; 2143191673Sjamie if (opt->value != NULL) { 2144191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) { 2145191673Sjamie bcopy(opt->value, 2146191673Sjamie optuio->uio_iov[pos].iov_base, 2147191673Sjamie opt->len); 2148191673Sjamie } else { 2149191673Sjamie error = copyout(opt->value, 2150191673Sjamie optuio->uio_iov[pos].iov_base, 2151191673Sjamie opt->len); 2152191673Sjamie if (error) 2153191673Sjamie break; 2154191673Sjamie } 2155191673Sjamie } 2156191673Sjamie } 2157185435Sbz } 2158191673Sjamie goto done_errmsg; 2159191673Sjamie 2160191673Sjamie done_deref: 2161191673Sjamie prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); 2162191673Sjamie goto done_errmsg; 2163191673Sjamie 2164191673Sjamie done_unlock_list: 2165191673Sjamie sx_sunlock(&allprison_lock); 2166191673Sjamie done_errmsg: 2167191673Sjamie if (error && errmsg_pos >= 0) { 2168191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 2169191673Sjamie errmsg_pos = 2 * errmsg_pos + 1; 2170191673Sjamie if (errmsg_len > 0) { 2171191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 2172191673Sjamie bcopy(errmsg, 2173191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2174191673Sjamie errmsg_len); 2175191673Sjamie else 2176191673Sjamie copyout(errmsg, 2177191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2178191673Sjamie errmsg_len); 2179191673Sjamie } 2180185435Sbz } 2181191673Sjamie vfs_freeopts(opts); 2182191673Sjamie return (error); 2183191673Sjamie} 2184113275Smike 2185192895Sjamie 2186191673Sjamie/* 2187191673Sjamie * struct jail_remove_args { 2188191673Sjamie * int jid; 2189191673Sjamie * }; 2190191673Sjamie */ 2191191673Sjamieint 2192225617Skmacysys_jail_remove(struct thread *td, struct jail_remove_args *uap) 2193191673Sjamie{ 2194192895Sjamie struct prison *pr, *cpr, *lpr, *tpr; 2195192895Sjamie int descend, error; 2196185435Sbz 2197191673Sjamie error = priv_check(td, PRIV_JAIL_REMOVE); 2198185435Sbz if (error) 2199191673Sjamie return (error); 2200185435Sbz 2201185435Sbz sx_xlock(&allprison_lock); 2202192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2203191673Sjamie if (pr == NULL) { 2204185435Sbz sx_xunlock(&allprison_lock); 2205191673Sjamie return (EINVAL); 2206185435Sbz } 2207185435Sbz 2208192895Sjamie /* Remove all descendants of this prison, then remove this prison. */ 2209192895Sjamie pr->pr_ref++; 2210192895Sjamie pr->pr_flags |= PR_REMOVE; 2211192895Sjamie if (!LIST_EMPTY(&pr->pr_children)) { 2212192895Sjamie mtx_unlock(&pr->pr_mtx); 2213192895Sjamie lpr = NULL; 2214192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 2215192895Sjamie mtx_lock(&cpr->pr_mtx); 2216192895Sjamie if (cpr->pr_ref > 0) { 2217192895Sjamie tpr = cpr; 2218192895Sjamie cpr->pr_ref++; 2219192895Sjamie cpr->pr_flags |= PR_REMOVE; 2220192895Sjamie } else { 2221192895Sjamie /* Already removed - do not do it again. */ 2222192895Sjamie tpr = NULL; 2223192895Sjamie } 2224192895Sjamie mtx_unlock(&cpr->pr_mtx); 2225192895Sjamie if (lpr != NULL) { 2226192895Sjamie mtx_lock(&lpr->pr_mtx); 2227192895Sjamie prison_remove_one(lpr); 2228192895Sjamie sx_xlock(&allprison_lock); 2229192895Sjamie } 2230192895Sjamie lpr = tpr; 2231192895Sjamie } 2232192895Sjamie if (lpr != NULL) { 2233192895Sjamie mtx_lock(&lpr->pr_mtx); 2234192895Sjamie prison_remove_one(lpr); 2235192895Sjamie sx_xlock(&allprison_lock); 2236192895Sjamie } 2237192895Sjamie mtx_lock(&pr->pr_mtx); 2238192895Sjamie } 2239192895Sjamie prison_remove_one(pr); 2240192895Sjamie return (0); 2241192895Sjamie} 2242192895Sjamie 2243192895Sjamiestatic void 2244192895Sjamieprison_remove_one(struct prison *pr) 2245192895Sjamie{ 2246192895Sjamie struct proc *p; 2247192895Sjamie int deuref; 2248192895Sjamie 2249191673Sjamie /* If the prison was persistent, it is not anymore. */ 2250191673Sjamie deuref = 0; 2251191673Sjamie if (pr->pr_flags & PR_PERSIST) { 2252191673Sjamie pr->pr_ref--; 2253191673Sjamie deuref = PD_DEUREF; 2254191673Sjamie pr->pr_flags &= ~PR_PERSIST; 2255179881Sdelphij } 2256113275Smike 2257192895Sjamie /* 2258192895Sjamie * jail_remove added a reference. If that's the only one, remove 2259192895Sjamie * the prison now. 2260192895Sjamie */ 2261192895Sjamie KASSERT(pr->pr_ref > 0, 2262192895Sjamie ("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id)); 2263192895Sjamie if (pr->pr_ref == 1) { 2264191673Sjamie prison_deref(pr, 2265191673Sjamie deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 2266192895Sjamie return; 2267191673Sjamie } 2268191673Sjamie 2269113275Smike mtx_unlock(&pr->pr_mtx); 2270191673Sjamie sx_xunlock(&allprison_lock); 2271191673Sjamie /* 2272191673Sjamie * Kill all processes unfortunate enough to be attached to this prison. 2273191673Sjamie */ 2274191673Sjamie sx_slock(&allproc_lock); 2275191673Sjamie LIST_FOREACH(p, &allproc, p_list) { 2276191673Sjamie PROC_LOCK(p); 2277191673Sjamie if (p->p_state != PRS_NEW && p->p_ucred && 2278191673Sjamie p->p_ucred->cr_prison == pr) 2279225617Skmacy kern_psignal(p, SIGKILL); 2280191673Sjamie PROC_UNLOCK(p); 2281191673Sjamie } 2282191673Sjamie sx_sunlock(&allproc_lock); 2283192895Sjamie /* Remove the temporary reference added by jail_remove. */ 2284191673Sjamie prison_deref(pr, deuref | PD_DEREF); 2285113275Smike} 2286113275Smike 2287190466Sjamie 2288113275Smike/* 2289114168Smike * struct jail_attach_args { 2290114168Smike * int jid; 2291114168Smike * }; 2292113275Smike */ 2293113275Smikeint 2294225617Skmacysys_jail_attach(struct thread *td, struct jail_attach_args *uap) 2295113275Smike{ 2296113275Smike struct prison *pr; 2297191673Sjamie int error; 2298167309Spjd 2299164032Srwatson error = priv_check(td, PRIV_JAIL_ATTACH); 2300126023Snectar if (error) 2301126023Snectar return (error); 2302126023Snectar 2303168401Spjd sx_slock(&allprison_lock); 2304192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2305113275Smike if (pr == NULL) { 2306168401Spjd sx_sunlock(&allprison_lock); 2307113275Smike return (EINVAL); 2308113275Smike } 2309185435Sbz 2310185435Sbz /* 2311185435Sbz * Do not allow a process to attach to a prison that is not 2312191673Sjamie * considered to be "alive". 2313185435Sbz */ 2314191673Sjamie if (pr->pr_uref == 0) { 2315185435Sbz mtx_unlock(&pr->pr_mtx); 2316185435Sbz sx_sunlock(&allprison_lock); 2317185435Sbz return (EINVAL); 2318185435Sbz } 2319191673Sjamie 2320191673Sjamie return (do_jail_attach(td, pr)); 2321191673Sjamie} 2322191673Sjamie 2323191673Sjamiestatic int 2324191673Sjamiedo_jail_attach(struct thread *td, struct prison *pr) 2325191673Sjamie{ 2326192895Sjamie struct prison *ppr; 2327191673Sjamie struct proc *p; 2328191673Sjamie struct ucred *newcred, *oldcred; 2329191673Sjamie int vfslocked, error; 2330191673Sjamie 2331191673Sjamie /* 2332191673Sjamie * XXX: Note that there is a slight race here if two threads 2333191673Sjamie * in the same privileged process attempt to attach to two 2334191673Sjamie * different jails at the same time. It is important for 2335191673Sjamie * user processes not to do this, or they might end up with 2336191673Sjamie * a process root from one prison, but attached to the jail 2337191673Sjamie * of another. 2338191673Sjamie */ 2339113275Smike pr->pr_ref++; 2340191673Sjamie pr->pr_uref++; 2341113275Smike mtx_unlock(&pr->pr_mtx); 2342191673Sjamie 2343191673Sjamie /* Let modules do whatever they need to prepare for attaching. */ 2344191673Sjamie error = osd_jail_call(pr, PR_METHOD_ATTACH, td); 2345191673Sjamie if (error) { 2346191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); 2347191673Sjamie return (error); 2348191673Sjamie } 2349168401Spjd sx_sunlock(&allprison_lock); 2350113275Smike 2351185435Sbz /* 2352185435Sbz * Reparent the newly attached process to this jail. 2353185435Sbz */ 2354192895Sjamie ppr = td->td_ucred->cr_prison; 2355191673Sjamie p = td->td_proc; 2356185435Sbz error = cpuset_setproc_update_set(p, pr->pr_cpuset); 2357185435Sbz if (error) 2358191673Sjamie goto e_revert_osd; 2359185435Sbz 2360150652Scsjp vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2361175202Sattilio vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); 2362113275Smike if ((error = change_dir(pr->pr_root, td)) != 0) 2363113275Smike goto e_unlock; 2364113275Smike#ifdef MAC 2365172930Srwatson if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) 2366113275Smike goto e_unlock; 2367113275Smike#endif 2368175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2369191673Sjamie if ((error = change_root(pr->pr_root, td))) 2370191673Sjamie goto e_unlock_giant; 2371150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2372113275Smike 237384828Sjhb newcred = crget(); 237484828Sjhb PROC_LOCK(p); 237584828Sjhb oldcred = p->p_ucred; 2376113275Smike setsugid(p); 237784828Sjhb crcopy(newcred, oldcred); 2378113630Sjhb newcred->cr_prison = pr; 237984828Sjhb p->p_ucred = newcred; 238084828Sjhb PROC_UNLOCK(p); 2381220137Strasz#ifdef RACCT 2382220137Strasz racct_proc_ucred_changed(p, oldcred, newcred); 2383220137Strasz#endif 238484828Sjhb crfree(oldcred); 2385192895Sjamie prison_deref(ppr, PD_DEREF | PD_DEUREF); 238646155Sphk return (0); 2387191673Sjamie e_unlock: 2388175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2389191673Sjamie e_unlock_giant: 2390150652Scsjp VFS_UNLOCK_GIANT(vfslocked); 2391191673Sjamie e_revert_osd: 2392191673Sjamie /* Tell modules this thread is still in its old jail after all. */ 2393192895Sjamie (void)osd_jail_call(ppr, PR_METHOD_ATTACH, td); 2394191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF); 239546155Sphk return (error); 239646155Sphk} 239746155Sphk 2398192895Sjamie 2399113275Smike/* 2400113275Smike * Returns a locked prison instance, or NULL on failure. 2401113275Smike */ 2402168399Spjdstruct prison * 2403113275Smikeprison_find(int prid) 2404113275Smike{ 2405113275Smike struct prison *pr; 2406113275Smike 2407168401Spjd sx_assert(&allprison_lock, SX_LOCKED); 2408191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2409113275Smike if (pr->pr_id == prid) { 2410113275Smike mtx_lock(&pr->pr_mtx); 2411191673Sjamie if (pr->pr_ref > 0) 2412191673Sjamie return (pr); 2413191673Sjamie mtx_unlock(&pr->pr_mtx); 2414113275Smike } 2415113275Smike } 2416113275Smike return (NULL); 2417113275Smike} 2418113275Smike 2419191673Sjamie/* 2420192895Sjamie * Find a prison that is a descendant of mypr. Returns a locked prison or NULL. 2421191673Sjamie */ 2422191673Sjamiestruct prison * 2423192895Sjamieprison_find_child(struct prison *mypr, int prid) 2424191673Sjamie{ 2425192895Sjamie struct prison *pr; 2426192895Sjamie int descend; 2427192895Sjamie 2428192895Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2429192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2430192895Sjamie if (pr->pr_id == prid) { 2431192895Sjamie mtx_lock(&pr->pr_mtx); 2432192895Sjamie if (pr->pr_ref > 0) 2433192895Sjamie return (pr); 2434192895Sjamie mtx_unlock(&pr->pr_mtx); 2435192895Sjamie } 2436192895Sjamie } 2437192895Sjamie return (NULL); 2438192895Sjamie} 2439192895Sjamie 2440192895Sjamie/* 2441192895Sjamie * Look for the name relative to mypr. Returns a locked prison or NULL. 2442192895Sjamie */ 2443192895Sjamiestruct prison * 2444192895Sjamieprison_find_name(struct prison *mypr, const char *name) 2445192895Sjamie{ 2446191673Sjamie struct prison *pr, *deadpr; 2447192895Sjamie size_t mylen; 2448192895Sjamie int descend; 2449191673Sjamie 2450191673Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2451192895Sjamie mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1; 2452191673Sjamie again: 2453191673Sjamie deadpr = NULL; 2454192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2455192895Sjamie if (!strcmp(pr->pr_name + mylen, name)) { 2456191673Sjamie mtx_lock(&pr->pr_mtx); 2457191673Sjamie if (pr->pr_ref > 0) { 2458191673Sjamie if (pr->pr_uref > 0) 2459191673Sjamie return (pr); 2460191673Sjamie deadpr = pr; 2461191673Sjamie } 2462191673Sjamie mtx_unlock(&pr->pr_mtx); 2463191673Sjamie } 2464191673Sjamie } 2465192895Sjamie /* There was no valid prison - perhaps there was a dying one. */ 2466191673Sjamie if (deadpr != NULL) { 2467191673Sjamie mtx_lock(&deadpr->pr_mtx); 2468191673Sjamie if (deadpr->pr_ref == 0) { 2469191673Sjamie mtx_unlock(&deadpr->pr_mtx); 2470191673Sjamie goto again; 2471191673Sjamie } 2472191673Sjamie } 2473191673Sjamie return (deadpr); 2474191673Sjamie} 2475191673Sjamie 2476191673Sjamie/* 2477192895Sjamie * See if a prison has the specific flag set. 2478192895Sjamie */ 2479192895Sjamieint 2480192895Sjamieprison_flag(struct ucred *cred, unsigned flag) 2481192895Sjamie{ 2482192895Sjamie 2483192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2484192895Sjamie return (cred->cr_prison->pr_flags & flag); 2485192895Sjamie} 2486192895Sjamie 2487192895Sjamieint 2488192895Sjamieprison_allow(struct ucred *cred, unsigned flag) 2489192895Sjamie{ 2490192895Sjamie 2491192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2492192895Sjamie return (cred->cr_prison->pr_allow & flag); 2493192895Sjamie} 2494192895Sjamie 2495192895Sjamie/* 2496191673Sjamie * Remove a prison reference. If that was the last reference, remove the 2497191673Sjamie * prison itself - but not in this context in case there are locks held. 2498191673Sjamie */ 249972786Srwatsonvoid 2500185029Spjdprison_free_locked(struct prison *pr) 250172786Srwatson{ 250272786Srwatson 2503185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 250472786Srwatson pr->pr_ref--; 250572786Srwatson if (pr->pr_ref == 0) { 2506168483Spjd mtx_unlock(&pr->pr_mtx); 2507124882Srwatson TASK_INIT(&pr->pr_task, 0, prison_complete, pr); 2508144660Sjeff taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 250987275Srwatson return; 251072786Srwatson } 251187275Srwatson mtx_unlock(&pr->pr_mtx); 251272786Srwatson} 251372786Srwatson 2514185029Spjdvoid 2515185029Spjdprison_free(struct prison *pr) 2516185029Spjd{ 2517185029Spjd 2518185029Spjd mtx_lock(&pr->pr_mtx); 2519185029Spjd prison_free_locked(pr); 2520185029Spjd} 2521185029Spjd 2522124882Srwatsonstatic void 2523124882Srwatsonprison_complete(void *context, int pending) 2524124882Srwatson{ 2525191673Sjamie 2526191673Sjamie prison_deref((struct prison *)context, 0); 2527191673Sjamie} 2528191673Sjamie 2529191673Sjamie/* 2530191673Sjamie * Remove a prison reference (usually). This internal version assumes no 2531191673Sjamie * mutexes are held, except perhaps the prison itself. If there are no more 2532191673Sjamie * references, release and delist the prison. On completion, the prison lock 2533191673Sjamie * and the allprison lock are both unlocked. 2534191673Sjamie */ 2535191673Sjamiestatic void 2536191673Sjamieprison_deref(struct prison *pr, int flags) 2537191673Sjamie{ 2538192895Sjamie struct prison *ppr, *tpr; 2539150652Scsjp int vfslocked; 2540124882Srwatson 2541191673Sjamie if (!(flags & PD_LOCKED)) 2542191673Sjamie mtx_lock(&pr->pr_mtx); 2543225191Sjamie for (;;) { 2544225191Sjamie if (flags & PD_DEUREF) { 2545225191Sjamie pr->pr_uref--; 2546225191Sjamie KASSERT(prison0.pr_uref != 0, ("prison0 pr_uref=0")); 2547192895Sjamie } 2548192895Sjamie if (flags & PD_DEREF) 2549192895Sjamie pr->pr_ref--; 2550192895Sjamie /* If the prison still has references, nothing else to do. */ 2551192895Sjamie if (pr->pr_ref > 0) { 2552192895Sjamie mtx_unlock(&pr->pr_mtx); 2553192895Sjamie if (flags & PD_LIST_SLOCKED) 2554192895Sjamie sx_sunlock(&allprison_lock); 2555192895Sjamie else if (flags & PD_LIST_XLOCKED) 2556192895Sjamie sx_xunlock(&allprison_lock); 2557192895Sjamie return; 2558191673Sjamie } 2559191673Sjamie 2560192895Sjamie mtx_unlock(&pr->pr_mtx); 2561192895Sjamie if (flags & PD_LIST_SLOCKED) { 2562192895Sjamie if (!sx_try_upgrade(&allprison_lock)) { 2563192895Sjamie sx_sunlock(&allprison_lock); 2564192895Sjamie sx_xlock(&allprison_lock); 2565192895Sjamie } 2566192895Sjamie } else if (!(flags & PD_LIST_XLOCKED)) 2567192895Sjamie sx_xlock(&allprison_lock); 2568168489Spjd 2569192895Sjamie TAILQ_REMOVE(&allprison, pr, pr_list); 2570192895Sjamie LIST_REMOVE(pr, pr_sibling); 2571192895Sjamie ppr = pr->pr_parent; 2572192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 2573194762Sjamie tpr->pr_childcount--; 2574196592Sjamie sx_xunlock(&allprison_lock); 2575192895Sjamie 2576194251Sjamie#ifdef VIMAGE 2577196505Szec if (pr->pr_vnet != ppr->pr_vnet) 2578194251Sjamie vnet_destroy(pr->pr_vnet); 2579194251Sjamie#endif 2580192895Sjamie if (pr->pr_root != NULL) { 2581192895Sjamie vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount); 2582192895Sjamie vrele(pr->pr_root); 2583192895Sjamie VFS_UNLOCK_GIANT(vfslocked); 2584192895Sjamie } 2585192895Sjamie mtx_destroy(&pr->pr_mtx); 2586191673Sjamie#ifdef INET 2587192895Sjamie free(pr->pr_ip4, M_PRISON); 2588191673Sjamie#endif 2589185435Sbz#ifdef INET6 2590192895Sjamie free(pr->pr_ip6, M_PRISON); 2591185435Sbz#endif 2592192895Sjamie if (pr->pr_cpuset != NULL) 2593192895Sjamie cpuset_rel(pr->pr_cpuset); 2594192895Sjamie osd_jail_exit(pr); 2595221362Strasz#ifdef RACCT 2596221362Strasz prison_racct_detach(pr); 2597220163Strasz#endif 2598192895Sjamie free(pr, M_PRISON); 2599192895Sjamie 2600192895Sjamie /* Removing a prison frees a reference on its parent. */ 2601192895Sjamie pr = ppr; 2602192895Sjamie mtx_lock(&pr->pr_mtx); 2603225191Sjamie flags = PD_DEREF | PD_DEUREF; 2604192895Sjamie } 2605124882Srwatson} 2606124882Srwatson 260772786Srwatsonvoid 2608185029Spjdprison_hold_locked(struct prison *pr) 260972786Srwatson{ 261072786Srwatson 2611185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2612168489Spjd KASSERT(pr->pr_ref > 0, 2613191671Sjamie ("Trying to hold dead prison (jid=%d).", pr->pr_id)); 261472786Srwatson pr->pr_ref++; 2615185029Spjd} 2616185029Spjd 2617185029Spjdvoid 2618185029Spjdprison_hold(struct prison *pr) 2619185029Spjd{ 2620185029Spjd 2621185029Spjd mtx_lock(&pr->pr_mtx); 2622185029Spjd prison_hold_locked(pr); 262387275Srwatson mtx_unlock(&pr->pr_mtx); 262472786Srwatson} 262572786Srwatson 2626185435Sbzvoid 2627185435Sbzprison_proc_hold(struct prison *pr) 262887275Srwatson{ 262987275Srwatson 2630185435Sbz mtx_lock(&pr->pr_mtx); 2631191673Sjamie KASSERT(pr->pr_uref > 0, 2632191673Sjamie ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); 2633191673Sjamie pr->pr_uref++; 2634185435Sbz mtx_unlock(&pr->pr_mtx); 263587275Srwatson} 263687275Srwatson 2637185435Sbzvoid 2638185435Sbzprison_proc_free(struct prison *pr) 2639185435Sbz{ 2640185435Sbz 2641185435Sbz mtx_lock(&pr->pr_mtx); 2642191673Sjamie KASSERT(pr->pr_uref > 0, 2643191673Sjamie ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); 2644191673Sjamie prison_deref(pr, PD_DEUREF | PD_LOCKED); 2645185435Sbz} 2646185435Sbz 2647185435Sbz 2648185435Sbz#ifdef INET 2649185435Sbz/* 2650192895Sjamie * Restrict a prison's IP address list with its parent's, possibly replacing 2651192895Sjamie * it. Return true if the replacement buffer was used (or would have been). 2652192895Sjamie */ 2653192895Sjamiestatic int 2654192895Sjamieprison_restrict_ip4(struct prison *pr, struct in_addr *newip4) 2655192895Sjamie{ 2656192895Sjamie int ii, ij, used; 2657192895Sjamie struct prison *ppr; 2658192895Sjamie 2659192895Sjamie ppr = pr->pr_parent; 2660192895Sjamie if (!(pr->pr_flags & PR_IP4_USER)) { 2661192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2662192895Sjamie if (pr->pr_ip4s < ppr->pr_ip4s) { 2663192895Sjamie /* 2664192895Sjamie * There's no room for the parent's list. Use the 2665192895Sjamie * new list buffer, which is assumed to be big enough 2666192895Sjamie * (if it was passed). If there's no buffer, try to 2667192895Sjamie * allocate one. 2668192895Sjamie */ 2669192895Sjamie used = 1; 2670192895Sjamie if (newip4 == NULL) { 2671192895Sjamie newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4), 2672192895Sjamie M_PRISON, M_NOWAIT); 2673192895Sjamie if (newip4 != NULL) 2674192895Sjamie used = 0; 2675192895Sjamie } 2676192895Sjamie if (newip4 != NULL) { 2677192895Sjamie bcopy(ppr->pr_ip4, newip4, 2678192895Sjamie ppr->pr_ip4s * sizeof(*newip4)); 2679192895Sjamie free(pr->pr_ip4, M_PRISON); 2680192895Sjamie pr->pr_ip4 = newip4; 2681192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2682192895Sjamie } 2683192895Sjamie return (used); 2684192895Sjamie } 2685192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2686192895Sjamie if (pr->pr_ip4s > 0) 2687192895Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 2688192895Sjamie pr->pr_ip4s * sizeof(*newip4)); 2689192895Sjamie else if (pr->pr_ip4 != NULL) { 2690192895Sjamie free(pr->pr_ip4, M_PRISON); 2691192895Sjamie pr->pr_ip4 = NULL; 2692192895Sjamie } 2693195974Sjamie } else if (pr->pr_ip4s > 0) { 2694192895Sjamie /* Remove addresses that aren't in the parent. */ 2695192895Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 2696192895Sjamie if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 2697192895Sjamie break; 2698192895Sjamie if (ij < ppr->pr_ip4s) 2699192895Sjamie ii = 1; 2700192895Sjamie else { 2701192895Sjamie bcopy(pr->pr_ip4 + 1, pr->pr_ip4, 2702192895Sjamie --pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2703192895Sjamie ii = 0; 2704192895Sjamie } 2705192895Sjamie for (ij = 1; ii < pr->pr_ip4s; ) { 2706192895Sjamie if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) { 2707192895Sjamie ii++; 2708192895Sjamie continue; 2709192895Sjamie } 2710192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2711192895Sjamie qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) { 2712192895Sjamie case -1: 2713192895Sjamie bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii, 2714192895Sjamie (--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4)); 2715192895Sjamie break; 2716192895Sjamie case 0: 2717192895Sjamie ii++; 2718192895Sjamie ij++; 2719192895Sjamie break; 2720192895Sjamie case 1: 2721192895Sjamie ij++; 2722192895Sjamie break; 2723192895Sjamie } 2724192895Sjamie } 2725192895Sjamie if (pr->pr_ip4s == 0) { 2726195870Sjamie pr->pr_flags |= PR_IP4_DISABLE; 2727192895Sjamie free(pr->pr_ip4, M_PRISON); 2728192895Sjamie pr->pr_ip4 = NULL; 2729192895Sjamie } 2730192895Sjamie } 2731192895Sjamie return (0); 2732192895Sjamie} 2733192895Sjamie 2734192895Sjamie/* 2735185435Sbz * Pass back primary IPv4 address of this jail. 2736185435Sbz * 2737192895Sjamie * If not restricted return success but do not alter the address. Caller has 2738192895Sjamie * to make sure to initialize it correctly (e.g. INADDR_ANY). 2739185435Sbz * 2740188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2741188144Sjamie * Address returned in NBO. 2742185435Sbz */ 274346155Sphkint 2744187684Sbzprison_get_ip4(struct ucred *cred, struct in_addr *ia) 274546155Sphk{ 2746191673Sjamie struct prison *pr; 274746155Sphk 2748185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2749185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2750185435Sbz 2751192895Sjamie pr = cred->cr_prison; 2752192895Sjamie if (!(pr->pr_flags & PR_IP4)) 275346155Sphk return (0); 2754191673Sjamie mtx_lock(&pr->pr_mtx); 2755192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2756192895Sjamie mtx_unlock(&pr->pr_mtx); 2757192895Sjamie return (0); 2758192895Sjamie } 2759191673Sjamie if (pr->pr_ip4 == NULL) { 2760191673Sjamie mtx_unlock(&pr->pr_mtx); 2761188144Sjamie return (EAFNOSUPPORT); 2762191673Sjamie } 2763185435Sbz 2764191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2765191673Sjamie mtx_unlock(&pr->pr_mtx); 2766185435Sbz return (0); 2767185435Sbz} 2768185435Sbz 2769185435Sbz/* 2770202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 2771202468Sbz * We will return 0 if we should bypass source address selection in favour 2772202468Sbz * of the primary jail IPv4 address. Only in this case *ia will be updated and 2773202468Sbz * returned in NBO. 2774202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv4. 2775202468Sbz */ 2776202468Sbzint 2777202468Sbzprison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia) 2778202468Sbz{ 2779202468Sbz struct prison *pr; 2780202468Sbz struct in_addr lia; 2781202468Sbz int error; 2782202468Sbz 2783202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2784202468Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2785202468Sbz 2786202468Sbz if (!jailed(cred)) 2787202468Sbz return (1); 2788202468Sbz 2789202468Sbz pr = cred->cr_prison; 2790202468Sbz if (pr->pr_flags & PR_IP4_SADDRSEL) 2791202468Sbz return (1); 2792202468Sbz 2793202468Sbz lia.s_addr = INADDR_ANY; 2794202468Sbz error = prison_get_ip4(cred, &lia); 2795202468Sbz if (error) 2796202468Sbz return (error); 2797202468Sbz if (lia.s_addr == INADDR_ANY) 2798202468Sbz return (1); 2799202468Sbz 2800202468Sbz ia->s_addr = lia.s_addr; 2801202468Sbz return (0); 2802202468Sbz} 2803202468Sbz 2804202468Sbz/* 2805192895Sjamie * Return true if pr1 and pr2 have the same IPv4 address restrictions. 2806192895Sjamie */ 2807192895Sjamieint 2808192895Sjamieprison_equal_ip4(struct prison *pr1, struct prison *pr2) 2809192895Sjamie{ 2810192895Sjamie 2811192895Sjamie if (pr1 == pr2) 2812192895Sjamie return (1); 2813192895Sjamie 2814192895Sjamie /* 2815195974Sjamie * No need to lock since the PR_IP4_USER flag can't be altered for 2816195974Sjamie * existing prisons. 2817192895Sjamie */ 2818195945Sjamie while (pr1 != &prison0 && 2819195945Sjamie#ifdef VIMAGE 2820195945Sjamie !(pr1->pr_flags & PR_VNET) && 2821195945Sjamie#endif 2822195945Sjamie !(pr1->pr_flags & PR_IP4_USER)) 2823192895Sjamie pr1 = pr1->pr_parent; 2824195945Sjamie while (pr2 != &prison0 && 2825195945Sjamie#ifdef VIMAGE 2826195945Sjamie !(pr2->pr_flags & PR_VNET) && 2827195945Sjamie#endif 2828195945Sjamie !(pr2->pr_flags & PR_IP4_USER)) 2829192895Sjamie pr2 = pr2->pr_parent; 2830192895Sjamie return (pr1 == pr2); 2831192895Sjamie} 2832192895Sjamie 2833192895Sjamie/* 2834185435Sbz * Make sure our (source) address is set to something meaningful to this 2835185435Sbz * jail. 2836185435Sbz * 2837192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2838192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2839192895Sjamie * doesn't allow IPv4. Address passed in in NBO and returned in NBO. 2840185435Sbz */ 2841185435Sbzint 2842185435Sbzprison_local_ip4(struct ucred *cred, struct in_addr *ia) 2843185435Sbz{ 2844191673Sjamie struct prison *pr; 2845185435Sbz struct in_addr ia0; 2846191673Sjamie int error; 2847185435Sbz 2848185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2849185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2850185435Sbz 2851192895Sjamie pr = cred->cr_prison; 2852192895Sjamie if (!(pr->pr_flags & PR_IP4)) 285346155Sphk return (0); 2854191673Sjamie mtx_lock(&pr->pr_mtx); 2855192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2856192895Sjamie mtx_unlock(&pr->pr_mtx); 2857192895Sjamie return (0); 2858192895Sjamie } 2859191673Sjamie if (pr->pr_ip4 == NULL) { 2860191673Sjamie mtx_unlock(&pr->pr_mtx); 2861188144Sjamie return (EAFNOSUPPORT); 2862191673Sjamie } 2863185435Sbz 2864185435Sbz ia0.s_addr = ntohl(ia->s_addr); 2865185435Sbz if (ia0.s_addr == INADDR_LOOPBACK) { 2866191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2867191673Sjamie mtx_unlock(&pr->pr_mtx); 2868185435Sbz return (0); 286946155Sphk } 2870185435Sbz 2871188144Sjamie if (ia0.s_addr == INADDR_ANY) { 2872188144Sjamie /* 2873188144Sjamie * In case there is only 1 IPv4 address, bind directly. 2874188144Sjamie */ 2875191673Sjamie if (pr->pr_ip4s == 1) 2876191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2877191673Sjamie mtx_unlock(&pr->pr_mtx); 2878185435Sbz return (0); 2879185435Sbz } 2880185435Sbz 2881191673Sjamie error = _prison_check_ip4(pr, ia); 2882191673Sjamie mtx_unlock(&pr->pr_mtx); 2883191673Sjamie return (error); 2884185435Sbz} 2885185435Sbz 2886185435Sbz/* 2887185435Sbz * Rewrite destination address in case we will connect to loopback address. 2888185435Sbz * 2889188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2890188144Sjamie * Address passed in in NBO and returned in NBO. 2891185435Sbz */ 2892185435Sbzint 2893185435Sbzprison_remote_ip4(struct ucred *cred, struct in_addr *ia) 2894185435Sbz{ 2895191673Sjamie struct prison *pr; 2896185435Sbz 2897185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2898185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2899185435Sbz 2900192895Sjamie pr = cred->cr_prison; 2901192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2902185435Sbz return (0); 2903191673Sjamie mtx_lock(&pr->pr_mtx); 2904192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2905192895Sjamie mtx_unlock(&pr->pr_mtx); 2906192895Sjamie return (0); 2907192895Sjamie } 2908191673Sjamie if (pr->pr_ip4 == NULL) { 2909191673Sjamie mtx_unlock(&pr->pr_mtx); 2910188144Sjamie return (EAFNOSUPPORT); 2911191673Sjamie } 2912188144Sjamie 2913185435Sbz if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { 2914191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2915191673Sjamie mtx_unlock(&pr->pr_mtx); 2916185435Sbz return (0); 2917185435Sbz } 2918185435Sbz 2919185435Sbz /* 2920185435Sbz * Return success because nothing had to be changed. 2921185435Sbz */ 2922191673Sjamie mtx_unlock(&pr->pr_mtx); 2923185435Sbz return (0); 2924185435Sbz} 2925185435Sbz 2926185435Sbz/* 2927188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 2928185435Sbz * 2929192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2930192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2931192895Sjamie * doesn't allow IPv4. Address passed in in NBO. 2932185435Sbz */ 2933185435Sbzstatic int 2934185435Sbz_prison_check_ip4(struct prison *pr, struct in_addr *ia) 2935185435Sbz{ 2936185435Sbz int i, a, z, d; 2937185435Sbz 2938185435Sbz /* 2939185435Sbz * Check the primary IP. 2940185435Sbz */ 2941185435Sbz if (pr->pr_ip4[0].s_addr == ia->s_addr) 2942188144Sjamie return (0); 2943185435Sbz 2944185435Sbz /* 2945185435Sbz * All the other IPs are sorted so we can do a binary search. 2946185435Sbz */ 2947185435Sbz a = 0; 2948185435Sbz z = pr->pr_ip4s - 2; 2949185435Sbz while (a <= z) { 2950185435Sbz i = (a + z) / 2; 2951185435Sbz d = qcmp_v4(&pr->pr_ip4[i+1], ia); 2952185435Sbz if (d > 0) 2953185435Sbz z = i - 1; 2954185435Sbz else if (d < 0) 2955185435Sbz a = i + 1; 295681114Srwatson else 2957188144Sjamie return (0); 2958185435Sbz } 2959188144Sjamie 2960188144Sjamie return (EADDRNOTAVAIL); 2961185435Sbz} 2962185435Sbz 2963185435Sbzint 2964185435Sbzprison_check_ip4(struct ucred *cred, struct in_addr *ia) 2965185435Sbz{ 2966191673Sjamie struct prison *pr; 2967191673Sjamie int error; 2968185435Sbz 2969185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2970185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2971185435Sbz 2972192895Sjamie pr = cred->cr_prison; 2973192895Sjamie if (!(pr->pr_flags & PR_IP4)) 2974188144Sjamie return (0); 2975191673Sjamie mtx_lock(&pr->pr_mtx); 2976192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2977192895Sjamie mtx_unlock(&pr->pr_mtx); 2978192895Sjamie return (0); 2979192895Sjamie } 2980191673Sjamie if (pr->pr_ip4 == NULL) { 2981191673Sjamie mtx_unlock(&pr->pr_mtx); 2982188144Sjamie return (EAFNOSUPPORT); 2983191673Sjamie } 2984185435Sbz 2985191673Sjamie error = _prison_check_ip4(pr, ia); 2986191673Sjamie mtx_unlock(&pr->pr_mtx); 2987191673Sjamie return (error); 2988185435Sbz} 2989185435Sbz#endif 2990185435Sbz 2991185435Sbz#ifdef INET6 2992192895Sjamiestatic int 2993192895Sjamieprison_restrict_ip6(struct prison *pr, struct in6_addr *newip6) 2994192895Sjamie{ 2995192895Sjamie int ii, ij, used; 2996192895Sjamie struct prison *ppr; 2997192895Sjamie 2998192895Sjamie ppr = pr->pr_parent; 2999192895Sjamie if (!(pr->pr_flags & PR_IP6_USER)) { 3000192895Sjamie /* This has no user settings, so just copy the parent's list. */ 3001192895Sjamie if (pr->pr_ip6s < ppr->pr_ip6s) { 3002192895Sjamie /* 3003192895Sjamie * There's no room for the parent's list. Use the 3004192895Sjamie * new list buffer, which is assumed to be big enough 3005192895Sjamie * (if it was passed). If there's no buffer, try to 3006192895Sjamie * allocate one. 3007192895Sjamie */ 3008192895Sjamie used = 1; 3009192895Sjamie if (newip6 == NULL) { 3010192895Sjamie newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6), 3011192895Sjamie M_PRISON, M_NOWAIT); 3012192895Sjamie if (newip6 != NULL) 3013192895Sjamie used = 0; 3014192895Sjamie } 3015192895Sjamie if (newip6 != NULL) { 3016192895Sjamie bcopy(ppr->pr_ip6, newip6, 3017192895Sjamie ppr->pr_ip6s * sizeof(*newip6)); 3018192895Sjamie free(pr->pr_ip6, M_PRISON); 3019192895Sjamie pr->pr_ip6 = newip6; 3020192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 3021192895Sjamie } 3022192895Sjamie return (used); 3023192895Sjamie } 3024192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 3025192895Sjamie if (pr->pr_ip6s > 0) 3026192895Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 3027192895Sjamie pr->pr_ip6s * sizeof(*newip6)); 3028192895Sjamie else if (pr->pr_ip6 != NULL) { 3029192895Sjamie free(pr->pr_ip6, M_PRISON); 3030192895Sjamie pr->pr_ip6 = NULL; 3031192895Sjamie } 3032195974Sjamie } else if (pr->pr_ip6s > 0) { 3033192895Sjamie /* Remove addresses that aren't in the parent. */ 3034192895Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 3035192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], 3036192895Sjamie &ppr->pr_ip6[ij])) 3037192895Sjamie break; 3038192895Sjamie if (ij < ppr->pr_ip6s) 3039192895Sjamie ii = 1; 3040192895Sjamie else { 3041192895Sjamie bcopy(pr->pr_ip6 + 1, pr->pr_ip6, 3042192895Sjamie --pr->pr_ip6s * sizeof(*pr->pr_ip6)); 3043192895Sjamie ii = 0; 3044192895Sjamie } 3045192895Sjamie for (ij = 1; ii < pr->pr_ip6s; ) { 3046192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii], 3047192895Sjamie &ppr->pr_ip6[0])) { 3048192895Sjamie ii++; 3049192895Sjamie continue; 3050192895Sjamie } 3051192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 3052192895Sjamie qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) { 3053192895Sjamie case -1: 3054192895Sjamie bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii, 3055192895Sjamie (--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6)); 3056192895Sjamie break; 3057192895Sjamie case 0: 3058192895Sjamie ii++; 3059192895Sjamie ij++; 3060192895Sjamie break; 3061192895Sjamie case 1: 3062192895Sjamie ij++; 3063192895Sjamie break; 3064192895Sjamie } 3065192895Sjamie } 3066192895Sjamie if (pr->pr_ip6s == 0) { 3067195870Sjamie pr->pr_flags |= PR_IP6_DISABLE; 3068192895Sjamie free(pr->pr_ip6, M_PRISON); 3069192895Sjamie pr->pr_ip6 = NULL; 3070192895Sjamie } 3071192895Sjamie } 3072192895Sjamie return 0; 3073192895Sjamie} 3074192895Sjamie 3075185435Sbz/* 3076185435Sbz * Pass back primary IPv6 address for this jail. 3077185435Sbz * 3078192895Sjamie * If not restricted return success but do not alter the address. Caller has 3079192895Sjamie * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). 3080185435Sbz * 3081188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3082185435Sbz */ 3083185435Sbzint 3084187684Sbzprison_get_ip6(struct ucred *cred, struct in6_addr *ia6) 3085185435Sbz{ 3086191673Sjamie struct prison *pr; 3087185435Sbz 3088185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3089185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3090185435Sbz 3091192895Sjamie pr = cred->cr_prison; 3092192895Sjamie if (!(pr->pr_flags & PR_IP6)) 309381114Srwatson return (0); 3094191673Sjamie mtx_lock(&pr->pr_mtx); 3095192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3096192895Sjamie mtx_unlock(&pr->pr_mtx); 3097192895Sjamie return (0); 3098192895Sjamie } 3099191673Sjamie if (pr->pr_ip6 == NULL) { 3100191673Sjamie mtx_unlock(&pr->pr_mtx); 3101188144Sjamie return (EAFNOSUPPORT); 3102191673Sjamie } 3103188144Sjamie 3104191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3105191673Sjamie mtx_unlock(&pr->pr_mtx); 3106185435Sbz return (0); 3107185435Sbz} 3108185435Sbz 3109185435Sbz/* 3110202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 3111202468Sbz * We will return 0 if we should bypass source address selection in favour 3112202468Sbz * of the primary jail IPv6 address. Only in this case *ia will be updated and 3113202468Sbz * returned in NBO. 3114202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv6. 3115202468Sbz */ 3116202468Sbzint 3117202468Sbzprison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) 3118202468Sbz{ 3119202468Sbz struct prison *pr; 3120202468Sbz struct in6_addr lia6; 3121202468Sbz int error; 3122202468Sbz 3123202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3124202468Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3125202468Sbz 3126202468Sbz if (!jailed(cred)) 3127202468Sbz return (1); 3128202468Sbz 3129202468Sbz pr = cred->cr_prison; 3130202468Sbz if (pr->pr_flags & PR_IP6_SADDRSEL) 3131202468Sbz return (1); 3132202468Sbz 3133202468Sbz lia6 = in6addr_any; 3134202468Sbz error = prison_get_ip6(cred, &lia6); 3135202468Sbz if (error) 3136202468Sbz return (error); 3137202468Sbz if (IN6_IS_ADDR_UNSPECIFIED(&lia6)) 3138202468Sbz return (1); 3139202468Sbz 3140202468Sbz bcopy(&lia6, ia6, sizeof(struct in6_addr)); 3141202468Sbz return (0); 3142202468Sbz} 3143202468Sbz 3144202468Sbz/* 3145192895Sjamie * Return true if pr1 and pr2 have the same IPv6 address restrictions. 3146192895Sjamie */ 3147192895Sjamieint 3148192895Sjamieprison_equal_ip6(struct prison *pr1, struct prison *pr2) 3149192895Sjamie{ 3150192895Sjamie 3151192895Sjamie if (pr1 == pr2) 3152192895Sjamie return (1); 3153192895Sjamie 3154195945Sjamie while (pr1 != &prison0 && 3155195945Sjamie#ifdef VIMAGE 3156195945Sjamie !(pr1->pr_flags & PR_VNET) && 3157195945Sjamie#endif 3158195945Sjamie !(pr1->pr_flags & PR_IP6_USER)) 3159192895Sjamie pr1 = pr1->pr_parent; 3160195945Sjamie while (pr2 != &prison0 && 3161195945Sjamie#ifdef VIMAGE 3162195945Sjamie !(pr2->pr_flags & PR_VNET) && 3163195945Sjamie#endif 3164195945Sjamie !(pr2->pr_flags & PR_IP6_USER)) 3165192895Sjamie pr2 = pr2->pr_parent; 3166192895Sjamie return (pr1 == pr2); 3167192895Sjamie} 3168192895Sjamie 3169192895Sjamie/* 3170185435Sbz * Make sure our (source) address is set to something meaningful to this jail. 3171185435Sbz * 3172185435Sbz * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) 3173185435Sbz * when needed while binding. 3174185435Sbz * 3175192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3176192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3177192895Sjamie * doesn't allow IPv6. 3178185435Sbz */ 3179185435Sbzint 3180185435Sbzprison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) 3181185435Sbz{ 3182191673Sjamie struct prison *pr; 3183191673Sjamie int error; 3184185435Sbz 3185185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3186185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3187185435Sbz 3188192895Sjamie pr = cred->cr_prison; 3189192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3190185435Sbz return (0); 3191191673Sjamie mtx_lock(&pr->pr_mtx); 3192192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3193192895Sjamie mtx_unlock(&pr->pr_mtx); 3194192895Sjamie return (0); 3195192895Sjamie } 3196191673Sjamie if (pr->pr_ip6 == NULL) { 3197191673Sjamie mtx_unlock(&pr->pr_mtx); 3198188144Sjamie return (EAFNOSUPPORT); 3199191673Sjamie } 3200188144Sjamie 3201185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3202191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3203191673Sjamie mtx_unlock(&pr->pr_mtx); 3204185435Sbz return (0); 320581114Srwatson } 3206185435Sbz 3207188144Sjamie if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { 3208188144Sjamie /* 3209188144Sjamie * In case there is only 1 IPv6 address, and v6only is true, 3210188144Sjamie * then bind directly. 3211188144Sjamie */ 3212191673Sjamie if (v6only != 0 && pr->pr_ip6s == 1) 3213191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3214191673Sjamie mtx_unlock(&pr->pr_mtx); 3215185435Sbz return (0); 3216185435Sbz } 3217188144Sjamie 3218191673Sjamie error = _prison_check_ip6(pr, ia6); 3219191673Sjamie mtx_unlock(&pr->pr_mtx); 3220191673Sjamie return (error); 3221185435Sbz} 3222185435Sbz 3223185435Sbz/* 3224185435Sbz * Rewrite destination address in case we will connect to loopback address. 3225185435Sbz * 3226188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3227185435Sbz */ 3228185435Sbzint 3229185435Sbzprison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) 3230185435Sbz{ 3231191673Sjamie struct prison *pr; 3232185435Sbz 3233185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3234185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3235185435Sbz 3236192895Sjamie pr = cred->cr_prison; 3237192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3238185435Sbz return (0); 3239191673Sjamie mtx_lock(&pr->pr_mtx); 3240192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3241192895Sjamie mtx_unlock(&pr->pr_mtx); 3242192895Sjamie return (0); 3243192895Sjamie } 3244191673Sjamie if (pr->pr_ip6 == NULL) { 3245191673Sjamie mtx_unlock(&pr->pr_mtx); 3246188144Sjamie return (EAFNOSUPPORT); 3247191673Sjamie } 3248188144Sjamie 3249185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3250191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3251191673Sjamie mtx_unlock(&pr->pr_mtx); 3252185435Sbz return (0); 3253185435Sbz } 3254185435Sbz 3255185435Sbz /* 3256185435Sbz * Return success because nothing had to be changed. 3257185435Sbz */ 3258191673Sjamie mtx_unlock(&pr->pr_mtx); 325946155Sphk return (0); 326046155Sphk} 326146155Sphk 3262185435Sbz/* 3263188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3264185435Sbz * 3265192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3266192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3267192895Sjamie * doesn't allow IPv6. 3268185435Sbz */ 3269185435Sbzstatic int 3270185435Sbz_prison_check_ip6(struct prison *pr, struct in6_addr *ia6) 327146155Sphk{ 3272185435Sbz int i, a, z, d; 327346155Sphk 3274185435Sbz /* 3275185435Sbz * Check the primary IP. 3276185435Sbz */ 3277185435Sbz if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) 3278188144Sjamie return (0); 3279185435Sbz 3280185435Sbz /* 3281185435Sbz * All the other IPs are sorted so we can do a binary search. 3282185435Sbz */ 3283185435Sbz a = 0; 3284185435Sbz z = pr->pr_ip6s - 2; 3285185435Sbz while (a <= z) { 3286185435Sbz i = (a + z) / 2; 3287185435Sbz d = qcmp_v6(&pr->pr_ip6[i+1], ia6); 3288185435Sbz if (d > 0) 3289185435Sbz z = i - 1; 3290185435Sbz else if (d < 0) 3291185435Sbz a = i + 1; 329246155Sphk else 3293188144Sjamie return (0); 329446155Sphk } 3295188144Sjamie 3296188144Sjamie return (EADDRNOTAVAIL); 329746155Sphk} 329846155Sphk 329946155Sphkint 3300185435Sbzprison_check_ip6(struct ucred *cred, struct in6_addr *ia6) 3301185435Sbz{ 3302191673Sjamie struct prison *pr; 3303191673Sjamie int error; 3304185435Sbz 3305185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3306185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3307185435Sbz 3308192895Sjamie pr = cred->cr_prison; 3309192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3310188144Sjamie return (0); 3311191673Sjamie mtx_lock(&pr->pr_mtx); 3312192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3313192895Sjamie mtx_unlock(&pr->pr_mtx); 3314192895Sjamie return (0); 3315192895Sjamie } 3316191673Sjamie if (pr->pr_ip6 == NULL) { 3317191673Sjamie mtx_unlock(&pr->pr_mtx); 3318188144Sjamie return (EAFNOSUPPORT); 3319191673Sjamie } 3320185435Sbz 3321191673Sjamie error = _prison_check_ip6(pr, ia6); 3322191673Sjamie mtx_unlock(&pr->pr_mtx); 3323191673Sjamie return (error); 3324185435Sbz} 3325185435Sbz#endif 3326185435Sbz 3327185435Sbz/* 3328188146Sjamie * Check if a jail supports the given address family. 3329188146Sjamie * 3330188146Sjamie * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT 3331188146Sjamie * if not. 3332188146Sjamie */ 3333188146Sjamieint 3334188146Sjamieprison_check_af(struct ucred *cred, int af) 3335188146Sjamie{ 3336192895Sjamie struct prison *pr; 3337188146Sjamie int error; 3338188146Sjamie 3339188146Sjamie KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3340188146Sjamie 3341192895Sjamie pr = cred->cr_prison; 3342194923Sjamie#ifdef VIMAGE 3343194915Sjamie /* Prisons with their own network stack are not limited. */ 3344200473Sbz if (prison_owns_vnet(cred)) 3345194915Sjamie return (0); 3346194923Sjamie#endif 3347194915Sjamie 3348188146Sjamie error = 0; 3349188146Sjamie switch (af) 3350188146Sjamie { 3351188146Sjamie#ifdef INET 3352188146Sjamie case AF_INET: 3353192895Sjamie if (pr->pr_flags & PR_IP4) 3354192895Sjamie { 3355192895Sjamie mtx_lock(&pr->pr_mtx); 3356192895Sjamie if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL) 3357192895Sjamie error = EAFNOSUPPORT; 3358192895Sjamie mtx_unlock(&pr->pr_mtx); 3359192895Sjamie } 3360188146Sjamie break; 3361188146Sjamie#endif 3362188146Sjamie#ifdef INET6 3363188146Sjamie case AF_INET6: 3364192895Sjamie if (pr->pr_flags & PR_IP6) 3365192895Sjamie { 3366192895Sjamie mtx_lock(&pr->pr_mtx); 3367192895Sjamie if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL) 3368192895Sjamie error = EAFNOSUPPORT; 3369192895Sjamie mtx_unlock(&pr->pr_mtx); 3370192895Sjamie } 3371188146Sjamie break; 3372188146Sjamie#endif 3373188146Sjamie case AF_LOCAL: 3374188146Sjamie case AF_ROUTE: 3375188146Sjamie break; 3376188146Sjamie default: 3377192895Sjamie if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF)) 3378188146Sjamie error = EAFNOSUPPORT; 3379188146Sjamie } 3380188146Sjamie return (error); 3381188146Sjamie} 3382188146Sjamie 3383188146Sjamie/* 3384185435Sbz * Check if given address belongs to the jail referenced by cred (wrapper to 3385185435Sbz * prison_check_ip[46]). 3386185435Sbz * 3387192895Sjamie * Returns 0 if jail doesn't restrict the address family or if address belongs 3388192895Sjamie * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if 3389192895Sjamie * the jail doesn't allow the address family. IPv4 Address passed in in NBO. 3390185435Sbz */ 3391185435Sbzint 339272786Srwatsonprison_if(struct ucred *cred, struct sockaddr *sa) 339346155Sphk{ 3394185435Sbz#ifdef INET 3395114168Smike struct sockaddr_in *sai; 3396185435Sbz#endif 3397185435Sbz#ifdef INET6 3398185435Sbz struct sockaddr_in6 *sai6; 3399185435Sbz#endif 3400188144Sjamie int error; 340146155Sphk 3402185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3403185435Sbz KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); 3404185435Sbz 3405200473Sbz#ifdef VIMAGE 3406200473Sbz if (prison_owns_vnet(cred)) 3407200473Sbz return (0); 3408200473Sbz#endif 3409200473Sbz 3410188144Sjamie error = 0; 3411188144Sjamie switch (sa->sa_family) 3412185435Sbz { 3413185435Sbz#ifdef INET 3414185435Sbz case AF_INET: 3415185435Sbz sai = (struct sockaddr_in *)sa; 3416188144Sjamie error = prison_check_ip4(cred, &sai->sin_addr); 3417185435Sbz break; 3418185435Sbz#endif 3419185435Sbz#ifdef INET6 3420185435Sbz case AF_INET6: 3421185435Sbz sai6 = (struct sockaddr_in6 *)sa; 3422188144Sjamie error = prison_check_ip6(cred, &sai6->sin6_addr); 3423185435Sbz break; 3424185435Sbz#endif 3425185435Sbz default: 3426192895Sjamie if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF)) 3427188144Sjamie error = EAFNOSUPPORT; 3428185435Sbz } 3429188144Sjamie return (error); 343046155Sphk} 343172786Srwatson 343272786Srwatson/* 343372786Srwatson * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. 343472786Srwatson */ 343572786Srwatsonint 3436114168Smikeprison_check(struct ucred *cred1, struct ucred *cred2) 343772786Srwatson{ 343872786Srwatson 3439192895Sjamie return ((cred1->cr_prison == cred2->cr_prison || 3440192895Sjamie prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH); 3441192895Sjamie} 344272786Srwatson 3443192895Sjamie/* 3444192895Sjamie * Return 1 if p2 is a child of p1, otherwise 0. 3445192895Sjamie */ 3446192895Sjamieint 3447192895Sjamieprison_ischild(struct prison *pr1, struct prison *pr2) 3448192895Sjamie{ 3449192895Sjamie 3450192895Sjamie for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent) 3451192895Sjamie if (pr1 == pr2) 3452192895Sjamie return (1); 345372786Srwatson return (0); 345472786Srwatson} 345572786Srwatson 345672786Srwatson/* 345772786Srwatson * Return 1 if the passed credential is in a jail, otherwise 0. 345872786Srwatson */ 345972786Srwatsonint 3460114168Smikejailed(struct ucred *cred) 346172786Srwatson{ 346272786Srwatson 3463192895Sjamie return (cred->cr_prison != &prison0); 346472786Srwatson} 346591384Srobert 346691384Srobert/* 3467200473Sbz * Return 1 if the passed credential is in a jail and that jail does not 3468200473Sbz * have its own virtual network stack, otherwise 0. 3469200473Sbz */ 3470200473Sbzint 3471200473Sbzjailed_without_vnet(struct ucred *cred) 3472200473Sbz{ 3473200473Sbz 3474200473Sbz if (!jailed(cred)) 3475200473Sbz return (0); 3476200473Sbz#ifdef VIMAGE 3477200473Sbz if (prison_owns_vnet(cred)) 3478200473Sbz return (0); 3479200473Sbz#endif 3480200473Sbz 3481200473Sbz return (1); 3482200473Sbz} 3483200473Sbz 3484200473Sbz/* 3485194090Sjamie * Return the correct hostname (domainname, et al) for the passed credential. 348691384Srobert */ 348791391Srobertvoid 3488114168Smikegetcredhostname(struct ucred *cred, char *buf, size_t size) 348991384Srobert{ 3490193066Sjamie struct prison *pr; 349191384Srobert 3492194090Sjamie /* 3493194090Sjamie * A NULL credential can be used to shortcut to the physical 3494194090Sjamie * system's hostname. 3495194090Sjamie */ 3496193066Sjamie pr = (cred != NULL) ? cred->cr_prison : &prison0; 3497193066Sjamie mtx_lock(&pr->pr_mtx); 3498194118Sjamie strlcpy(buf, pr->pr_hostname, size); 3499193066Sjamie mtx_unlock(&pr->pr_mtx); 350091384Srobert} 3501113275Smike 3502194090Sjamievoid 3503194090Sjamiegetcreddomainname(struct ucred *cred, char *buf, size_t size) 3504194090Sjamie{ 3505194090Sjamie 3506194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3507194118Sjamie strlcpy(buf, cred->cr_prison->pr_domainname, size); 3508194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3509194090Sjamie} 3510194090Sjamie 3511194090Sjamievoid 3512194090Sjamiegetcredhostuuid(struct ucred *cred, char *buf, size_t size) 3513194090Sjamie{ 3514194090Sjamie 3515194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3516194118Sjamie strlcpy(buf, cred->cr_prison->pr_hostuuid, size); 3517194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3518194090Sjamie} 3519194090Sjamie 3520194090Sjamievoid 3521194090Sjamiegetcredhostid(struct ucred *cred, unsigned long *hostid) 3522194090Sjamie{ 3523194090Sjamie 3524194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3525194090Sjamie *hostid = cred->cr_prison->pr_hostid; 3526194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3527194090Sjamie} 3528194090Sjamie 3529196176Sbz#ifdef VIMAGE 3530125804Srwatson/* 3531196176Sbz * Determine whether the prison represented by cred owns 3532196176Sbz * its vnet rather than having it inherited. 3533196176Sbz * 3534196176Sbz * Returns 1 in case the prison owns the vnet, 0 otherwise. 3535196176Sbz */ 3536196176Sbzint 3537196176Sbzprison_owns_vnet(struct ucred *cred) 3538196176Sbz{ 3539196176Sbz 3540196176Sbz /* 3541196176Sbz * vnets cannot be added/removed after jail creation, 3542196176Sbz * so no need to lock here. 3543196176Sbz */ 3544196176Sbz return (cred->cr_prison->pr_flags & PR_VNET ? 1 : 0); 3545196176Sbz} 3546196176Sbz#endif 3547196176Sbz 3548196176Sbz/* 3549147185Spjd * Determine whether the subject represented by cred can "see" 3550147185Spjd * status of a mount point. 3551147185Spjd * Returns: 0 for permitted, ENOENT otherwise. 3552147185Spjd * XXX: This function should be called cr_canseemount() and should be 3553147185Spjd * placed in kern_prot.c. 3554125804Srwatson */ 3555125804Srwatsonint 3556147185Spjdprison_canseemount(struct ucred *cred, struct mount *mp) 3557125804Srwatson{ 3558147185Spjd struct prison *pr; 3559147185Spjd struct statfs *sp; 3560147185Spjd size_t len; 3561125804Srwatson 3562192895Sjamie pr = cred->cr_prison; 3563192895Sjamie if (pr->pr_enforce_statfs == 0) 3564147185Spjd return (0); 3565147185Spjd if (pr->pr_root->v_mount == mp) 3566147185Spjd return (0); 3567192895Sjamie if (pr->pr_enforce_statfs == 2) 3568147185Spjd return (ENOENT); 3569147185Spjd /* 3570147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3571147185Spjd * all mount-points from inside a jail. 3572147185Spjd * This is ugly check, but this is the only situation when jail's 3573147185Spjd * directory ends with '/'. 3574147185Spjd */ 3575147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3576147185Spjd return (0); 3577147185Spjd len = strlen(pr->pr_path); 3578147185Spjd sp = &mp->mnt_stat; 3579147185Spjd if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) 3580147185Spjd return (ENOENT); 3581147185Spjd /* 3582147185Spjd * Be sure that we don't have situation where jail's root directory 3583147185Spjd * is "/some/path" and mount point is "/some/pathpath". 3584147185Spjd */ 3585147185Spjd if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') 3586147185Spjd return (ENOENT); 3587147185Spjd return (0); 3588147185Spjd} 3589147185Spjd 3590147185Spjdvoid 3591147185Spjdprison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) 3592147185Spjd{ 3593147185Spjd char jpath[MAXPATHLEN]; 3594147185Spjd struct prison *pr; 3595147185Spjd size_t len; 3596147185Spjd 3597192895Sjamie pr = cred->cr_prison; 3598192895Sjamie if (pr->pr_enforce_statfs == 0) 3599147185Spjd return; 3600147185Spjd if (prison_canseemount(cred, mp) != 0) { 3601147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3602147185Spjd strlcpy(sp->f_mntonname, "[restricted]", 3603147185Spjd sizeof(sp->f_mntonname)); 3604147185Spjd return; 3605125804Srwatson } 3606147185Spjd if (pr->pr_root->v_mount == mp) { 3607147185Spjd /* 3608147185Spjd * Clear current buffer data, so we are sure nothing from 3609147185Spjd * the valid path left there. 3610147185Spjd */ 3611147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3612147185Spjd *sp->f_mntonname = '/'; 3613147185Spjd return; 3614147185Spjd } 3615147185Spjd /* 3616147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3617147185Spjd * all mount-points from inside a jail. 3618147185Spjd */ 3619147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3620147185Spjd return; 3621147185Spjd len = strlen(pr->pr_path); 3622147185Spjd strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); 3623147185Spjd /* 3624147185Spjd * Clear current buffer data, so we are sure nothing from 3625147185Spjd * the valid path left there. 3626147185Spjd */ 3627147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3628147185Spjd if (*jpath == '\0') { 3629147185Spjd /* Should never happen. */ 3630147185Spjd *sp->f_mntonname = '/'; 3631147185Spjd } else { 3632147185Spjd strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); 3633147185Spjd } 3634125804Srwatson} 3635125804Srwatson 3636164032Srwatson/* 3637164032Srwatson * Check with permission for a specific privilege is granted within jail. We 3638164032Srwatson * have a specific list of accepted privileges; the rest are denied. 3639164032Srwatson */ 3640164032Srwatsonint 3641164032Srwatsonprison_priv_check(struct ucred *cred, int priv) 3642164032Srwatson{ 3643164032Srwatson 3644164032Srwatson if (!jailed(cred)) 3645164032Srwatson return (0); 3646164032Srwatson 3647194915Sjamie#ifdef VIMAGE 3648194915Sjamie /* 3649194915Sjamie * Privileges specific to prisons with a virtual network stack. 3650194915Sjamie * There might be a duplicate entry here in case the privilege 3651194915Sjamie * is only granted conditionally in the legacy jail case. 3652194915Sjamie */ 3653164032Srwatson switch (priv) { 3654194915Sjamie#ifdef notyet 3655194915Sjamie /* 3656194915Sjamie * NFS-specific privileges. 3657194915Sjamie */ 3658194915Sjamie case PRIV_NFS_DAEMON: 3659194915Sjamie case PRIV_NFS_LOCKD: 3660194915Sjamie#endif 3661194915Sjamie /* 3662194915Sjamie * Network stack privileges. 3663194915Sjamie */ 3664194915Sjamie case PRIV_NET_BRIDGE: 3665194915Sjamie case PRIV_NET_GRE: 3666194915Sjamie case PRIV_NET_BPF: 3667194915Sjamie case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */ 3668194915Sjamie case PRIV_NET_ROUTE: 3669194915Sjamie case PRIV_NET_TAP: 3670194915Sjamie case PRIV_NET_SETIFMTU: 3671194915Sjamie case PRIV_NET_SETIFFLAGS: 3672194915Sjamie case PRIV_NET_SETIFCAP: 3673203052Sdelphij case PRIV_NET_SETIFDESCR: 3674194915Sjamie case PRIV_NET_SETIFNAME : 3675194915Sjamie case PRIV_NET_SETIFMETRIC: 3676194915Sjamie case PRIV_NET_SETIFPHYS: 3677194915Sjamie case PRIV_NET_SETIFMAC: 3678194915Sjamie case PRIV_NET_ADDMULTI: 3679194915Sjamie case PRIV_NET_DELMULTI: 3680194915Sjamie case PRIV_NET_HWIOCTL: 3681194915Sjamie case PRIV_NET_SETLLADDR: 3682194915Sjamie case PRIV_NET_ADDIFGROUP: 3683194915Sjamie case PRIV_NET_DELIFGROUP: 3684194915Sjamie case PRIV_NET_IFCREATE: 3685194915Sjamie case PRIV_NET_IFDESTROY: 3686194915Sjamie case PRIV_NET_ADDIFADDR: 3687194915Sjamie case PRIV_NET_DELIFADDR: 3688194915Sjamie case PRIV_NET_LAGG: 3689194915Sjamie case PRIV_NET_GIF: 3690194915Sjamie case PRIV_NET_SETIFVNET: 3691223735Sbz case PRIV_NET_SETIFFIB: 3692164032Srwatson 3693164032Srwatson /* 3694194915Sjamie * 802.11-related privileges. 3695194915Sjamie */ 3696194915Sjamie case PRIV_NET80211_GETKEY: 3697194915Sjamie#ifdef notyet 3698194915Sjamie case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */ 3699194915Sjamie#endif 3700194915Sjamie 3701194915Sjamie#ifdef notyet 3702194915Sjamie /* 3703194915Sjamie * AppleTalk privileges. 3704194915Sjamie */ 3705194915Sjamie case PRIV_NETATALK_RESERVEDPORT: 3706194915Sjamie 3707194915Sjamie /* 3708194915Sjamie * ATM privileges. 3709194915Sjamie */ 3710194915Sjamie case PRIV_NETATM_CFG: 3711194915Sjamie case PRIV_NETATM_ADD: 3712194915Sjamie case PRIV_NETATM_DEL: 3713194915Sjamie case PRIV_NETATM_SET: 3714194915Sjamie 3715194915Sjamie /* 3716194915Sjamie * Bluetooth privileges. 3717194915Sjamie */ 3718194915Sjamie case PRIV_NETBLUETOOTH_RAW: 3719194915Sjamie#endif 3720194915Sjamie 3721194915Sjamie /* 3722194915Sjamie * Netgraph and netgraph module privileges. 3723194915Sjamie */ 3724194915Sjamie case PRIV_NETGRAPH_CONTROL: 3725194915Sjamie#ifdef notyet 3726194915Sjamie case PRIV_NETGRAPH_TTY: 3727194915Sjamie#endif 3728194915Sjamie 3729194915Sjamie /* 3730194915Sjamie * IPv4 and IPv6 privileges. 3731194915Sjamie */ 3732194915Sjamie case PRIV_NETINET_IPFW: 3733194915Sjamie case PRIV_NETINET_DIVERT: 3734194915Sjamie case PRIV_NETINET_PF: 3735194915Sjamie case PRIV_NETINET_DUMMYNET: 3736194915Sjamie case PRIV_NETINET_CARP: 3737194915Sjamie case PRIV_NETINET_MROUTE: 3738194915Sjamie case PRIV_NETINET_RAW: 3739194915Sjamie case PRIV_NETINET_ADDRCTRL6: 3740194915Sjamie case PRIV_NETINET_ND6: 3741194915Sjamie case PRIV_NETINET_SCOPE6: 3742194915Sjamie case PRIV_NETINET_ALIFETIME6: 3743194915Sjamie case PRIV_NETINET_IPSEC: 3744194915Sjamie case PRIV_NETINET_BINDANY: 3745194915Sjamie 3746194915Sjamie#ifdef notyet 3747194915Sjamie /* 3748194915Sjamie * IPX/SPX privileges. 3749194915Sjamie */ 3750194915Sjamie case PRIV_NETIPX_RESERVEDPORT: 3751194915Sjamie case PRIV_NETIPX_RAW: 3752194915Sjamie 3753194915Sjamie /* 3754194915Sjamie * NCP privileges. 3755194915Sjamie */ 3756194915Sjamie case PRIV_NETNCP: 3757194915Sjamie 3758194915Sjamie /* 3759194915Sjamie * SMB privileges. 3760194915Sjamie */ 3761194915Sjamie case PRIV_NETSMB: 3762194915Sjamie#endif 3763194915Sjamie 3764194915Sjamie /* 3765194915Sjamie * No default: or deny here. 3766194915Sjamie * In case of no permit fall through to next switch(). 3767194915Sjamie */ 3768194915Sjamie if (cred->cr_prison->pr_flags & PR_VNET) 3769194915Sjamie return (0); 3770194915Sjamie } 3771194915Sjamie#endif /* VIMAGE */ 3772194915Sjamie 3773194915Sjamie switch (priv) { 3774194915Sjamie 3775194915Sjamie /* 3776164032Srwatson * Allow ktrace privileges for root in jail. 3777164032Srwatson */ 3778164032Srwatson case PRIV_KTRACE: 3779164032Srwatson 3780166827Srwatson#if 0 3781164032Srwatson /* 3782164032Srwatson * Allow jailed processes to configure audit identity and 3783164032Srwatson * submit audit records (login, etc). In the future we may 3784164032Srwatson * want to further refine the relationship between audit and 3785164032Srwatson * jail. 3786164032Srwatson */ 3787164032Srwatson case PRIV_AUDIT_GETAUDIT: 3788164032Srwatson case PRIV_AUDIT_SETAUDIT: 3789164032Srwatson case PRIV_AUDIT_SUBMIT: 3790166827Srwatson#endif 3791164032Srwatson 3792164032Srwatson /* 3793164032Srwatson * Allow jailed processes to manipulate process UNIX 3794164032Srwatson * credentials in any way they see fit. 3795164032Srwatson */ 3796164032Srwatson case PRIV_CRED_SETUID: 3797164032Srwatson case PRIV_CRED_SETEUID: 3798164032Srwatson case PRIV_CRED_SETGID: 3799164032Srwatson case PRIV_CRED_SETEGID: 3800164032Srwatson case PRIV_CRED_SETGROUPS: 3801164032Srwatson case PRIV_CRED_SETREUID: 3802164032Srwatson case PRIV_CRED_SETREGID: 3803164032Srwatson case PRIV_CRED_SETRESUID: 3804164032Srwatson case PRIV_CRED_SETRESGID: 3805164032Srwatson 3806164032Srwatson /* 3807164032Srwatson * Jail implements visibility constraints already, so allow 3808164032Srwatson * jailed root to override uid/gid-based constraints. 3809164032Srwatson */ 3810164032Srwatson case PRIV_SEEOTHERGIDS: 3811164032Srwatson case PRIV_SEEOTHERUIDS: 3812164032Srwatson 3813164032Srwatson /* 3814164032Srwatson * Jail implements inter-process debugging limits already, so 3815164032Srwatson * allow jailed root various debugging privileges. 3816164032Srwatson */ 3817164032Srwatson case PRIV_DEBUG_DIFFCRED: 3818164032Srwatson case PRIV_DEBUG_SUGID: 3819164032Srwatson case PRIV_DEBUG_UNPRIV: 3820164032Srwatson 3821164032Srwatson /* 3822164032Srwatson * Allow jail to set various resource limits and login 3823164032Srwatson * properties, and for now, exceed process resource limits. 3824164032Srwatson */ 3825164032Srwatson case PRIV_PROC_LIMIT: 3826164032Srwatson case PRIV_PROC_SETLOGIN: 3827164032Srwatson case PRIV_PROC_SETRLIMIT: 3828164032Srwatson 3829164032Srwatson /* 3830164032Srwatson * System V and POSIX IPC privileges are granted in jail. 3831164032Srwatson */ 3832164032Srwatson case PRIV_IPC_READ: 3833164032Srwatson case PRIV_IPC_WRITE: 3834164032Srwatson case PRIV_IPC_ADMIN: 3835164032Srwatson case PRIV_IPC_MSGSIZE: 3836164032Srwatson case PRIV_MQ_ADMIN: 3837164032Srwatson 3838164032Srwatson /* 3839192895Sjamie * Jail operations within a jail work on child jails. 3840192895Sjamie */ 3841192895Sjamie case PRIV_JAIL_ATTACH: 3842192895Sjamie case PRIV_JAIL_SET: 3843192895Sjamie case PRIV_JAIL_REMOVE: 3844192895Sjamie 3845192895Sjamie /* 3846164032Srwatson * Jail implements its own inter-process limits, so allow 3847164032Srwatson * root processes in jail to change scheduling on other 3848164032Srwatson * processes in the same jail. Likewise for signalling. 3849164032Srwatson */ 3850164032Srwatson case PRIV_SCHED_DIFFCRED: 3851185435Sbz case PRIV_SCHED_CPUSET: 3852164032Srwatson case PRIV_SIGNAL_DIFFCRED: 3853164032Srwatson case PRIV_SIGNAL_SUGID: 3854164032Srwatson 3855164032Srwatson /* 3856164032Srwatson * Allow jailed processes to write to sysctls marked as jail 3857164032Srwatson * writable. 3858164032Srwatson */ 3859164032Srwatson case PRIV_SYSCTL_WRITEJAIL: 3860164032Srwatson 3861164032Srwatson /* 3862164032Srwatson * Allow root in jail to manage a variety of quota 3863166831Srwatson * properties. These should likely be conditional on a 3864166831Srwatson * configuration option. 3865164032Srwatson */ 3866166832Srwatson case PRIV_VFS_GETQUOTA: 3867166832Srwatson case PRIV_VFS_SETQUOTA: 3868164032Srwatson 3869164032Srwatson /* 3870164032Srwatson * Since Jail relies on chroot() to implement file system 3871164032Srwatson * protections, grant many VFS privileges to root in jail. 3872164032Srwatson * Be careful to exclude mount-related and NFS-related 3873164032Srwatson * privileges. 3874164032Srwatson */ 3875164032Srwatson case PRIV_VFS_READ: 3876164032Srwatson case PRIV_VFS_WRITE: 3877164032Srwatson case PRIV_VFS_ADMIN: 3878164032Srwatson case PRIV_VFS_EXEC: 3879164032Srwatson case PRIV_VFS_LOOKUP: 3880164032Srwatson case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ 3881164032Srwatson case PRIV_VFS_CHFLAGS_DEV: 3882164032Srwatson case PRIV_VFS_CHOWN: 3883164032Srwatson case PRIV_VFS_CHROOT: 3884167152Spjd case PRIV_VFS_RETAINSUGID: 3885164032Srwatson case PRIV_VFS_FCHROOT: 3886164032Srwatson case PRIV_VFS_LINK: 3887164032Srwatson case PRIV_VFS_SETGID: 3888172860Srwatson case PRIV_VFS_STAT: 3889164032Srwatson case PRIV_VFS_STICKYFILE: 3890164032Srwatson return (0); 3891164032Srwatson 3892164032Srwatson /* 3893164032Srwatson * Depending on the global setting, allow privilege of 3894164032Srwatson * setting system flags. 3895164032Srwatson */ 3896164032Srwatson case PRIV_VFS_SYSFLAGS: 3897192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS) 3898164032Srwatson return (0); 3899164032Srwatson else 3900164032Srwatson return (EPERM); 3901164032Srwatson 3902164032Srwatson /* 3903168396Spjd * Depending on the global setting, allow privilege of 3904168396Spjd * mounting/unmounting file systems. 3905168396Spjd */ 3906168396Spjd case PRIV_VFS_MOUNT: 3907168396Spjd case PRIV_VFS_UNMOUNT: 3908168396Spjd case PRIV_VFS_MOUNT_NONUSER: 3909168699Spjd case PRIV_VFS_MOUNT_OWNER: 3910224615Smm if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT && 3911224615Smm cred->cr_prison->pr_enforce_statfs < 2) 3912168396Spjd return (0); 3913168396Spjd else 3914168396Spjd return (EPERM); 3915168396Spjd 3916168396Spjd /* 3917168591Srwatson * Allow jailed root to bind reserved ports and reuse in-use 3918168591Srwatson * ports. 3919164032Srwatson */ 3920164032Srwatson case PRIV_NETINET_RESERVEDPORT: 3921168591Srwatson case PRIV_NETINET_REUSEPORT: 3922164032Srwatson return (0); 3923164032Srwatson 3924164032Srwatson /* 3925175630Sbz * Allow jailed root to set certian IPv4/6 (option) headers. 3926175630Sbz */ 3927175630Sbz case PRIV_NETINET_SETHDROPTS: 3928175630Sbz return (0); 3929175630Sbz 3930175630Sbz /* 3931164032Srwatson * Conditionally allow creating raw sockets in jail. 3932164032Srwatson */ 3933164032Srwatson case PRIV_NETINET_RAW: 3934192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS) 3935164032Srwatson return (0); 3936164032Srwatson else 3937164032Srwatson return (EPERM); 3938164032Srwatson 3939164032Srwatson /* 3940164032Srwatson * Since jail implements its own visibility limits on netstat 3941164032Srwatson * sysctls, allow getcred. This allows identd to work in 3942164032Srwatson * jail. 3943164032Srwatson */ 3944164032Srwatson case PRIV_NETINET_GETCRED: 3945164032Srwatson return (0); 3946164032Srwatson 3947219304Strasz /* 3948219304Strasz * Allow jailed root to set loginclass. 3949219304Strasz */ 3950219304Strasz case PRIV_PROC_SETLOGINCLASS: 3951219304Strasz return (0); 3952219304Strasz 3953164032Srwatson default: 3954164032Srwatson /* 3955164032Srwatson * In all remaining cases, deny the privilege request. This 3956164032Srwatson * includes almost all network privileges, many system 3957164032Srwatson * configuration privileges. 3958164032Srwatson */ 3959164032Srwatson return (EPERM); 3960164032Srwatson } 3961164032Srwatson} 3962164032Srwatson 3963192895Sjamie/* 3964192895Sjamie * Return the part of pr2's name that is relative to pr1, or the whole name 3965192895Sjamie * if it does not directly follow. 3966192895Sjamie */ 3967192895Sjamie 3968192895Sjamiechar * 3969192895Sjamieprison_name(struct prison *pr1, struct prison *pr2) 3970192895Sjamie{ 3971192895Sjamie char *name; 3972192895Sjamie 3973192895Sjamie /* Jails see themselves as "0" (if they see themselves at all). */ 3974192895Sjamie if (pr1 == pr2) 3975192895Sjamie return "0"; 3976192895Sjamie name = pr2->pr_name; 3977192895Sjamie if (prison_ischild(pr1, pr2)) { 3978192895Sjamie /* 3979192895Sjamie * pr1 isn't locked (and allprison_lock may not be either) 3980192895Sjamie * so its length can't be counted on. But the number of dots 3981192895Sjamie * can be counted on - and counted. 3982192895Sjamie */ 3983192895Sjamie for (; pr1 != &prison0; pr1 = pr1->pr_parent) 3984192895Sjamie name = strchr(name, '.') + 1; 3985192895Sjamie } 3986192895Sjamie return (name); 3987192895Sjamie} 3988192895Sjamie 3989192895Sjamie/* 3990192895Sjamie * Return the part of pr2's path that is relative to pr1, or the whole path 3991192895Sjamie * if it does not directly follow. 3992192895Sjamie */ 3993192895Sjamiestatic char * 3994192895Sjamieprison_path(struct prison *pr1, struct prison *pr2) 3995192895Sjamie{ 3996192895Sjamie char *path1, *path2; 3997192895Sjamie int len1; 3998192895Sjamie 3999192895Sjamie path1 = pr1->pr_path; 4000192895Sjamie path2 = pr2->pr_path; 4001192895Sjamie if (!strcmp(path1, "/")) 4002192895Sjamie return (path2); 4003192895Sjamie len1 = strlen(path1); 4004192895Sjamie if (strncmp(path1, path2, len1)) 4005192895Sjamie return (path2); 4006192895Sjamie if (path2[len1] == '\0') 4007192895Sjamie return "/"; 4008192895Sjamie if (path2[len1] == '/') 4009192895Sjamie return (path2 + len1); 4010192895Sjamie return (path2); 4011192895Sjamie} 4012192895Sjamie 4013192895Sjamie 4014192895Sjamie/* 4015192895Sjamie * Jail-related sysctls. 4016192895Sjamie */ 4017227309Sedstatic SYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, 4018192895Sjamie "Jails"); 4019192895Sjamie 4020113275Smikestatic int 4021113275Smikesysctl_jail_list(SYSCTL_HANDLER_ARGS) 4022113275Smike{ 4023191673Sjamie struct xprison *xp; 4024192895Sjamie struct prison *pr, *cpr; 4025191673Sjamie#ifdef INET 4026191673Sjamie struct in_addr *ip4 = NULL; 4027191673Sjamie int ip4s = 0; 4028191673Sjamie#endif 4029191673Sjamie#ifdef INET6 4030208803Scperciva struct in6_addr *ip6 = NULL; 4031191673Sjamie int ip6s = 0; 4032191673Sjamie#endif 4033192895Sjamie int descend, error; 4034113275Smike 4035191673Sjamie xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); 4036192895Sjamie pr = req->td->td_ucred->cr_prison; 4037191673Sjamie error = 0; 4038168401Spjd sx_slock(&allprison_lock); 4039192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 4040192895Sjamie#if defined(INET) || defined(INET6) 4041191673Sjamie again: 4042192895Sjamie#endif 4043192895Sjamie mtx_lock(&cpr->pr_mtx); 4044185435Sbz#ifdef INET 4045192895Sjamie if (cpr->pr_ip4s > 0) { 4046192895Sjamie if (ip4s < cpr->pr_ip4s) { 4047192895Sjamie ip4s = cpr->pr_ip4s; 4048192895Sjamie mtx_unlock(&cpr->pr_mtx); 4049191673Sjamie ip4 = realloc(ip4, ip4s * 4050191673Sjamie sizeof(struct in_addr), M_TEMP, M_WAITOK); 4051191673Sjamie goto again; 4052191673Sjamie } 4053192895Sjamie bcopy(cpr->pr_ip4, ip4, 4054192895Sjamie cpr->pr_ip4s * sizeof(struct in_addr)); 4055191673Sjamie } 4056185435Sbz#endif 4057185435Sbz#ifdef INET6 4058192895Sjamie if (cpr->pr_ip6s > 0) { 4059192895Sjamie if (ip6s < cpr->pr_ip6s) { 4060192895Sjamie ip6s = cpr->pr_ip6s; 4061192895Sjamie mtx_unlock(&cpr->pr_mtx); 4062191673Sjamie ip6 = realloc(ip6, ip6s * 4063191673Sjamie sizeof(struct in6_addr), M_TEMP, M_WAITOK); 4064191673Sjamie goto again; 4065191673Sjamie } 4066192895Sjamie bcopy(cpr->pr_ip6, ip6, 4067192895Sjamie cpr->pr_ip6s * sizeof(struct in6_addr)); 4068191673Sjamie } 4069185435Sbz#endif 4070192895Sjamie if (cpr->pr_ref == 0) { 4071192895Sjamie mtx_unlock(&cpr->pr_mtx); 4072191673Sjamie continue; 4073191673Sjamie } 4074191673Sjamie bzero(xp, sizeof(*xp)); 4075113275Smike xp->pr_version = XPRISON_VERSION; 4076192895Sjamie xp->pr_id = cpr->pr_id; 4077192895Sjamie xp->pr_state = cpr->pr_uref > 0 4078191673Sjamie ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; 4079192895Sjamie strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path)); 4080194118Sjamie strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host)); 4081192895Sjamie strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name)); 4082185435Sbz#ifdef INET 4083192895Sjamie xp->pr_ip4s = cpr->pr_ip4s; 4084185435Sbz#endif 4085185435Sbz#ifdef INET6 4086192895Sjamie xp->pr_ip6s = cpr->pr_ip6s; 4087185435Sbz#endif 4088192895Sjamie mtx_unlock(&cpr->pr_mtx); 4089191673Sjamie error = SYSCTL_OUT(req, xp, sizeof(*xp)); 4090191673Sjamie if (error) 4091191673Sjamie break; 4092185435Sbz#ifdef INET 4093191673Sjamie if (xp->pr_ip4s > 0) { 4094191673Sjamie error = SYSCTL_OUT(req, ip4, 4095191673Sjamie xp->pr_ip4s * sizeof(struct in_addr)); 4096191673Sjamie if (error) 4097191673Sjamie break; 4098185435Sbz } 4099185435Sbz#endif 4100185435Sbz#ifdef INET6 4101191673Sjamie if (xp->pr_ip6s > 0) { 4102191673Sjamie error = SYSCTL_OUT(req, ip6, 4103191673Sjamie xp->pr_ip6s * sizeof(struct in6_addr)); 4104191673Sjamie if (error) 4105191673Sjamie break; 4106185435Sbz } 4107185435Sbz#endif 4108113275Smike } 4109168401Spjd sx_sunlock(&allprison_lock); 4110191673Sjamie free(xp, M_TEMP); 4111191673Sjamie#ifdef INET 4112191673Sjamie free(ip4, M_TEMP); 4113191673Sjamie#endif 4114191673Sjamie#ifdef INET6 4115191673Sjamie free(ip6, M_TEMP); 4116191673Sjamie#endif 4117167354Spjd return (error); 4118113275Smike} 4119113275Smike 4120187864SedSYSCTL_OID(_security_jail, OID_AUTO, list, 4121187864Sed CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4122187864Sed sysctl_jail_list, "S", "List of active jails"); 4123126004Spjd 4124126004Spjdstatic int 4125126004Spjdsysctl_jail_jailed(SYSCTL_HANDLER_ARGS) 4126126004Spjd{ 4127126004Spjd int error, injail; 4128126004Spjd 4129126004Spjd injail = jailed(req->td->td_ucred); 4130126004Spjd error = SYSCTL_OUT(req, &injail, sizeof(injail)); 4131126004Spjd 4132126004Spjd return (error); 4133126004Spjd} 4134192895Sjamie 4135187864SedSYSCTL_PROC(_security_jail, OID_AUTO, jailed, 4136187864Sed CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4137187864Sed sysctl_jail_jailed, "I", "Process in jail?"); 4138185435Sbz 4139192895Sjamie#if defined(INET) || defined(INET6) 4140193865SjamieSYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, 4141192895Sjamie &jail_max_af_ips, 0, 4142192895Sjamie "Number of IP addresses a jail may have at most per address family"); 4143192895Sjamie#endif 4144192895Sjamie 4145192895Sjamie/* 4146192895Sjamie * Default parameters for jail(2) compatability. For historical reasons, 4147192895Sjamie * the sysctl names have varying similarity to the parameter names. Prisons 4148192895Sjamie * just see their own parameters, and can't change them. 4149192895Sjamie */ 4150192895Sjamiestatic int 4151192895Sjamiesysctl_jail_default_allow(SYSCTL_HANDLER_ARGS) 4152192895Sjamie{ 4153192895Sjamie struct prison *pr; 4154192895Sjamie int allow, error, i; 4155192895Sjamie 4156192895Sjamie pr = req->td->td_ucred->cr_prison; 4157192895Sjamie allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow; 4158192895Sjamie 4159192895Sjamie /* Get the current flag value, and convert it to a boolean. */ 4160192895Sjamie i = (allow & arg2) ? 1 : 0; 4161192895Sjamie if (arg1 != NULL) 4162192895Sjamie i = !i; 4163192895Sjamie error = sysctl_handle_int(oidp, &i, 0, req); 4164192895Sjamie if (error || !req->newptr) 4165192895Sjamie return (error); 4166192895Sjamie i = i ? arg2 : 0; 4167192895Sjamie if (arg1 != NULL) 4168192895Sjamie i ^= arg2; 4169192895Sjamie /* 4170192895Sjamie * The sysctls don't have CTLFLAGS_PRISON, so assume prison0 4171192895Sjamie * for writing. 4172192895Sjamie */ 4173192895Sjamie mtx_lock(&prison0.pr_mtx); 4174192895Sjamie jail_default_allow = (jail_default_allow & ~arg2) | i; 4175192895Sjamie mtx_unlock(&prison0.pr_mtx); 4176192895Sjamie return (0); 4177192895Sjamie} 4178192895Sjamie 4179192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed, 4180192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4181192895Sjamie NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I", 4182192895Sjamie "Processes in jail can set their hostnames"); 4183192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only, 4184192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4185192895Sjamie (void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I", 4186192895Sjamie "Processes in jail are limited to creating UNIX/IP/route sockets only"); 4187192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed, 4188192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4189192895Sjamie NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I", 4190192895Sjamie "Processes in jail can use System V IPC primitives"); 4191192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets, 4192192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4193192895Sjamie NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I", 4194192895Sjamie "Prison root can create raw sockets"); 4195192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed, 4196192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4197192895Sjamie NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I", 4198192895Sjamie "Processes in jail can alter system file flags"); 4199192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed, 4200192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4201192895Sjamie NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I", 4202192895Sjamie "Processes in jail can mount/unmount jail-friendly file systems"); 4203232059SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_devfs_allowed, 4204232059Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4205232059Smm NULL, PR_ALLOW_MOUNT_DEVFS, sysctl_jail_default_allow, "I", 4206232186Smm "Processes in jail can mount the devfs file system"); 4207232059SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_nullfs_allowed, 4208232059Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4209232059Smm NULL, PR_ALLOW_MOUNT_NULLFS, sysctl_jail_default_allow, "I", 4210232186Smm "Processes in jail can mount the nullfs file system"); 4211232278SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_procfs_allowed, 4212232278Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4213232278Smm NULL, PR_ALLOW_MOUNT_PROCFS, sysctl_jail_default_allow, "I", 4214232278Smm "Processes in jail can mount the procfs file system"); 4215232186SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_zfs_allowed, 4216232186Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4217232186Smm NULL, PR_ALLOW_MOUNT_ZFS, sysctl_jail_default_allow, "I", 4218232186Smm "Processes in jail can mount the zfs file system"); 4219192895Sjamie 4220192895Sjamiestatic int 4221192895Sjamiesysctl_jail_default_level(SYSCTL_HANDLER_ARGS) 4222192895Sjamie{ 4223192895Sjamie struct prison *pr; 4224192895Sjamie int level, error; 4225192895Sjamie 4226192895Sjamie pr = req->td->td_ucred->cr_prison; 4227192895Sjamie level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2); 4228192895Sjamie error = sysctl_handle_int(oidp, &level, 0, req); 4229192895Sjamie if (error || !req->newptr) 4230192895Sjamie return (error); 4231192895Sjamie *(int *)arg1 = level; 4232192895Sjamie return (0); 4233192895Sjamie} 4234192895Sjamie 4235192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs, 4236192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4237192895Sjamie &jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs), 4238192895Sjamie sysctl_jail_default_level, "I", 4239192895Sjamie "Processes in jail cannot see all mounted file systems"); 4240192895Sjamie 4241231267SmmSYSCTL_PROC(_security_jail, OID_AUTO, devfs_ruleset, 4242231267Smm CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, 4243231267Smm &jail_default_devfs_rsnum, offsetof(struct prison, pr_devfs_rsnum), 4244231267Smm sysctl_jail_default_level, "I", 4245231267Smm "Ruleset for the devfs filesystem in jail"); 4246231267Smm 4247192895Sjamie/* 4248192895Sjamie * Nodes to describe jail parameters. Maximum length of string parameters 4249192895Sjamie * is returned in the string itself, and the other parameters exist merely 4250192895Sjamie * to make themselves and their types known. 4251192895Sjamie */ 4252192895SjamieSYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, 4253192895Sjamie "Jail parameters"); 4254192895Sjamie 4255192895Sjamieint 4256192895Sjamiesysctl_jail_param(SYSCTL_HANDLER_ARGS) 4257192895Sjamie{ 4258192895Sjamie int i; 4259192895Sjamie long l; 4260192895Sjamie size_t s; 4261192895Sjamie char numbuf[12]; 4262192895Sjamie 4263192895Sjamie switch (oidp->oid_kind & CTLTYPE) 4264192895Sjamie { 4265192895Sjamie case CTLTYPE_LONG: 4266192895Sjamie case CTLTYPE_ULONG: 4267192895Sjamie l = 0; 4268192895Sjamie#ifdef SCTL_MASK32 4269192895Sjamie if (!(req->flags & SCTL_MASK32)) 4270192895Sjamie#endif 4271192895Sjamie return (SYSCTL_OUT(req, &l, sizeof(l))); 4272192895Sjamie case CTLTYPE_INT: 4273192895Sjamie case CTLTYPE_UINT: 4274192895Sjamie i = 0; 4275192895Sjamie return (SYSCTL_OUT(req, &i, sizeof(i))); 4276192895Sjamie case CTLTYPE_STRING: 4277219819Sjeff snprintf(numbuf, sizeof(numbuf), "%jd", (intmax_t)arg2); 4278192895Sjamie return 4279192895Sjamie (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); 4280192895Sjamie case CTLTYPE_STRUCT: 4281192895Sjamie s = (size_t)arg2; 4282192895Sjamie return (SYSCTL_OUT(req, &s, sizeof(s))); 4283192895Sjamie } 4284192895Sjamie return (0); 4285192895Sjamie} 4286192895Sjamie 4287192895SjamieSYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID"); 4288192895SjamieSYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID"); 4289192895SjamieSYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); 4290192895SjamieSYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path"); 4291192895SjamieSYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, 4292192895Sjamie "I", "Jail secure level"); 4293192895SjamieSYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW, 4294192895Sjamie "I", "Jail cannot see all mounted file systems"); 4295231267SmmSYSCTL_JAIL_PARAM(, devfs_ruleset, CTLTYPE_INT | CTLFLAG_RW, 4296231267Smm "I", "Ruleset for in-jail devfs mounts"); 4297192895SjamieSYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, 4298192895Sjamie "B", "Jail persistence"); 4299194251Sjamie#ifdef VIMAGE 4300194251SjamieSYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN, 4301195870Sjamie "E,jailsys", "Virtual network stack"); 4302194251Sjamie#endif 4303192895SjamieSYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, 4304192895Sjamie "B", "Jail is in the process of shutting down"); 4305192895Sjamie 4306194762SjamieSYSCTL_JAIL_PARAM_NODE(children, "Number of child jails"); 4307194762SjamieSYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD, 4308194762Sjamie "I", "Current number of child jails"); 4309194762SjamieSYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW, 4310194762Sjamie "I", "Maximum number of child jails"); 4311194762Sjamie 4312195870SjamieSYSCTL_JAIL_PARAM_SYS_NODE(host, CTLFLAG_RW, "Jail host info"); 4313192895SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, 4314192895Sjamie "Jail hostname"); 4315193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN, 4316193066Sjamie "Jail NIS domainname"); 4317193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN, 4318193066Sjamie "Jail host UUID"); 4319193066SjamieSYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW, 4320193066Sjamie "LU", "Jail host ID"); 4321192895Sjamie 4322192895SjamieSYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset"); 4323192895SjamieSYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); 4324192895Sjamie 4325192895Sjamie#ifdef INET 4326195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip4, CTLFLAG_RDTUN, 4327195974Sjamie "Jail IPv4 address virtualization"); 4328192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), 4329192895Sjamie "S,in_addr,a", "Jail IPv4 addresses"); 4330202468SbzSYSCTL_JAIL_PARAM(_ip4, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4331202468Sbz "B", "Do (not) use IPv4 source address selection rather than the " 4332202468Sbz "primary jail IPv4 address."); 4333192895Sjamie#endif 4334192895Sjamie#ifdef INET6 4335195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip6, CTLFLAG_RDTUN, 4336195974Sjamie "Jail IPv6 address virtualization"); 4337192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), 4338192895Sjamie "S,in6_addr,a", "Jail IPv6 addresses"); 4339202468SbzSYSCTL_JAIL_PARAM(_ip6, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4340202468Sbz "B", "Do (not) use IPv6 source address selection rather than the " 4341202468Sbz "primary jail IPv6 address."); 4342192895Sjamie#endif 4343192895Sjamie 4344192895SjamieSYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags"); 4345192895SjamieSYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW, 4346192895Sjamie "B", "Jail may set hostname"); 4347192895SjamieSYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW, 4348192895Sjamie "B", "Jail may use SYSV IPC"); 4349192895SjamieSYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW, 4350192895Sjamie "B", "Jail may create raw sockets"); 4351192895SjamieSYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW, 4352192895Sjamie "B", "Jail may alter system file flags"); 4353192895SjamieSYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW, 4354192895Sjamie "B", "Jail may set file quotas"); 4355192895SjamieSYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW, 4356192895Sjamie "B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route"); 4357192895Sjamie 4358232059SmmSYSCTL_JAIL_PARAM_SUBNODE(allow, mount, "Jail mount/unmount permission flags"); 4359232059SmmSYSCTL_JAIL_PARAM(_allow_mount, , CTLTYPE_INT | CTLFLAG_RW, 4360232059Smm "B", "Jail may mount/unmount jail-friendly file systems in general"); 4361232059SmmSYSCTL_JAIL_PARAM(_allow_mount, devfs, CTLTYPE_INT | CTLFLAG_RW, 4362232186Smm "B", "Jail may mount the devfs file system"); 4363232059SmmSYSCTL_JAIL_PARAM(_allow_mount, nullfs, CTLTYPE_INT | CTLFLAG_RW, 4364232186Smm "B", "Jail may mount the nullfs file system"); 4365232278SmmSYSCTL_JAIL_PARAM(_allow_mount, procfs, CTLTYPE_INT | CTLFLAG_RW, 4366232278Smm "B", "Jail may mount the procfs file system"); 4367232186SmmSYSCTL_JAIL_PARAM(_allow_mount, zfs, CTLTYPE_INT | CTLFLAG_RW, 4368232186Smm "B", "Jail may mount the zfs file system"); 4369232059Smm 4370220137Straszvoid 4371220137Straszprison_racct_foreach(void (*callback)(struct racct *racct, 4372220137Strasz void *arg2, void *arg3), void *arg2, void *arg3) 4373220137Strasz{ 4374221362Strasz struct prison_racct *prr; 4375192895Sjamie 4376220137Strasz sx_slock(&allprison_lock); 4377221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) 4378221362Strasz (callback)(prr->prr_racct, arg2, arg3); 4379220137Strasz sx_sunlock(&allprison_lock); 4380220137Strasz} 4381220137Strasz 4382221362Straszstatic struct prison_racct * 4383221362Straszprison_racct_find_locked(const char *name) 4384221362Strasz{ 4385221362Strasz struct prison_racct *prr; 4386221362Strasz 4387221362Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4388221362Strasz 4389221362Strasz if (name[0] == '\0' || strlen(name) >= MAXHOSTNAMELEN) 4390221362Strasz return (NULL); 4391221362Strasz 4392221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) { 4393221362Strasz if (strcmp(name, prr->prr_name) != 0) 4394221362Strasz continue; 4395221362Strasz 4396221362Strasz /* Found prison_racct with a matching name? */ 4397221362Strasz prison_racct_hold(prr); 4398221362Strasz return (prr); 4399221362Strasz } 4400221362Strasz 4401221362Strasz /* Add new prison_racct. */ 4402221362Strasz prr = malloc(sizeof(*prr), M_PRISON_RACCT, M_ZERO | M_WAITOK); 4403221362Strasz racct_create(&prr->prr_racct); 4404221362Strasz 4405221362Strasz strcpy(prr->prr_name, name); 4406221362Strasz refcount_init(&prr->prr_refcount, 1); 4407221362Strasz LIST_INSERT_HEAD(&allprison_racct, prr, prr_next); 4408221362Strasz 4409221362Strasz return (prr); 4410221362Strasz} 4411221362Strasz 4412221362Straszstruct prison_racct * 4413221362Straszprison_racct_find(const char *name) 4414221362Strasz{ 4415221362Strasz struct prison_racct *prr; 4416221362Strasz 4417221362Strasz sx_xlock(&allprison_lock); 4418221362Strasz prr = prison_racct_find_locked(name); 4419221362Strasz sx_xunlock(&allprison_lock); 4420221362Strasz return (prr); 4421221362Strasz} 4422221362Strasz 4423221362Straszvoid 4424221362Straszprison_racct_hold(struct prison_racct *prr) 4425221362Strasz{ 4426221362Strasz 4427221362Strasz refcount_acquire(&prr->prr_refcount); 4428221362Strasz} 4429221362Strasz 4430221362Straszvoid 4431221362Straszprison_racct_free(struct prison_racct *prr) 4432221362Strasz{ 4433221362Strasz int old; 4434221362Strasz 4435221362Strasz old = prr->prr_refcount; 4436221362Strasz if (old > 1 && atomic_cmpset_int(&prr->prr_refcount, old, old - 1)) 4437221362Strasz return; 4438221362Strasz 4439221362Strasz sx_xlock(&allprison_lock); 4440221362Strasz if (refcount_release(&prr->prr_refcount)) { 4441221362Strasz racct_destroy(&prr->prr_racct); 4442221362Strasz LIST_REMOVE(prr, prr_next); 4443221362Strasz sx_xunlock(&allprison_lock); 4444221362Strasz free(prr, M_PRISON_RACCT); 4445221362Strasz 4446221362Strasz return; 4447221362Strasz } 4448221362Strasz sx_xunlock(&allprison_lock); 4449221362Strasz} 4450221362Strasz 4451221362Strasz#ifdef RACCT 4452221362Straszstatic void 4453221362Straszprison_racct_attach(struct prison *pr) 4454221362Strasz{ 4455221362Strasz struct prison_racct *prr; 4456221362Strasz 4457221362Strasz prr = prison_racct_find_locked(pr->pr_name); 4458221362Strasz KASSERT(prr != NULL, ("cannot find prison_racct")); 4459221362Strasz 4460221362Strasz pr->pr_prison_racct = prr; 4461221362Strasz} 4462221362Strasz 4463221362Straszstatic void 4464221362Straszprison_racct_detach(struct prison *pr) 4465221362Strasz{ 4466221362Strasz prison_racct_free(pr->pr_prison_racct); 4467221362Strasz pr->pr_prison_racct = NULL; 4468221362Strasz} 4469221362Strasz#endif /* RACCT */ 4470221362Strasz 4471185435Sbz#ifdef DDB 4472191673Sjamie 4473191673Sjamiestatic void 4474191673Sjamiedb_show_prison(struct prison *pr) 4475185435Sbz{ 4476192895Sjamie int fi; 4477191673Sjamie#if defined(INET) || defined(INET6) 4478191673Sjamie int ii; 4479185435Sbz#endif 4480195870Sjamie unsigned jsf; 4481185435Sbz#ifdef INET6 4482185435Sbz char ip6buf[INET6_ADDRSTRLEN]; 4483185435Sbz#endif 4484185435Sbz 4485191673Sjamie db_printf("prison %p:\n", pr); 4486191673Sjamie db_printf(" jid = %d\n", pr->pr_id); 4487191673Sjamie db_printf(" name = %s\n", pr->pr_name); 4488192895Sjamie db_printf(" parent = %p\n", pr->pr_parent); 4489191673Sjamie db_printf(" ref = %d\n", pr->pr_ref); 4490191673Sjamie db_printf(" uref = %d\n", pr->pr_uref); 4491191673Sjamie db_printf(" path = %s\n", pr->pr_path); 4492191673Sjamie db_printf(" cpuset = %d\n", pr->pr_cpuset 4493191673Sjamie ? pr->pr_cpuset->cs_id : -1); 4494194251Sjamie#ifdef VIMAGE 4495194251Sjamie db_printf(" vnet = %p\n", pr->pr_vnet); 4496194251Sjamie#endif 4497191673Sjamie db_printf(" root = %p\n", pr->pr_root); 4498191673Sjamie db_printf(" securelevel = %d\n", pr->pr_securelevel); 4499231267Smm db_printf(" devfs_rsnum = %d\n", pr->pr_devfs_rsnum); 4500202123Sbz db_printf(" children.max = %d\n", pr->pr_childmax); 4501202123Sbz db_printf(" children.cur = %d\n", pr->pr_childcount); 4502192895Sjamie db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children)); 4503192895Sjamie db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling)); 4504202123Sbz db_printf(" flags = 0x%x", pr->pr_flags); 4505192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 4506192895Sjamie fi++) 4507192895Sjamie if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi))) 4508192895Sjamie db_printf(" %s", pr_flag_names[fi]); 4509195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 4510195870Sjamie fi++) { 4511195870Sjamie jsf = pr->pr_flags & 4512195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 4513195870Sjamie db_printf(" %-16s= %s\n", pr_flag_jailsys[fi].name, 4514195870Sjamie pr_flag_jailsys[fi].disable && 4515195870Sjamie (jsf == pr_flag_jailsys[fi].disable) ? "disable" 4516195870Sjamie : (jsf == pr_flag_jailsys[fi].new) ? "new" 4517195870Sjamie : "inherit"); 4518195870Sjamie } 4519202123Sbz db_printf(" allow = 0x%x", pr->pr_allow); 4520192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 4521192895Sjamie fi++) 4522192895Sjamie if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi))) 4523192895Sjamie db_printf(" %s", pr_allow_names[fi]); 4524191673Sjamie db_printf("\n"); 4525192895Sjamie db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs); 4526194118Sjamie db_printf(" host.hostname = %s\n", pr->pr_hostname); 4527194118Sjamie db_printf(" host.domainname = %s\n", pr->pr_domainname); 4528194118Sjamie db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid); 4529193066Sjamie db_printf(" host.hostid = %lu\n", pr->pr_hostid); 4530185435Sbz#ifdef INET 4531191673Sjamie db_printf(" ip4s = %d\n", pr->pr_ip4s); 4532191673Sjamie for (ii = 0; ii < pr->pr_ip4s; ii++) 4533191673Sjamie db_printf(" %s %s\n", 4534202123Sbz ii == 0 ? "ip4.addr =" : " ", 4535191673Sjamie inet_ntoa(pr->pr_ip4[ii])); 4536185435Sbz#endif 4537185435Sbz#ifdef INET6 4538191673Sjamie db_printf(" ip6s = %d\n", pr->pr_ip6s); 4539191673Sjamie for (ii = 0; ii < pr->pr_ip6s; ii++) 4540191673Sjamie db_printf(" %s %s\n", 4541202123Sbz ii == 0 ? "ip6.addr =" : " ", 4542191673Sjamie ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); 4543191673Sjamie#endif 4544191673Sjamie} 4545191673Sjamie 4546191673SjamieDB_SHOW_COMMAND(prison, db_show_prison_command) 4547191673Sjamie{ 4548191673Sjamie struct prison *pr; 4549191673Sjamie 4550191673Sjamie if (!have_addr) { 4551192895Sjamie /* 4552192895Sjamie * Show all prisons in the list, and prison0 which is not 4553192895Sjamie * listed. 4554192895Sjamie */ 4555192895Sjamie db_show_prison(&prison0); 4556192895Sjamie if (!db_pager_quit) { 4557192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 4558192895Sjamie db_show_prison(pr); 4559192895Sjamie if (db_pager_quit) 4560192895Sjamie break; 4561192895Sjamie } 4562191673Sjamie } 4563191673Sjamie return; 4564191673Sjamie } 4565191673Sjamie 4566192895Sjamie if (addr == 0) 4567192895Sjamie pr = &prison0; 4568192895Sjamie else { 4569192895Sjamie /* Look for a prison with the ID and with references. */ 4570191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4571192895Sjamie if (pr->pr_id == addr && pr->pr_ref > 0) 4572191673Sjamie break; 4573192895Sjamie if (pr == NULL) 4574192895Sjamie /* Look again, without requiring a reference. */ 4575192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4576192895Sjamie if (pr->pr_id == addr) 4577192895Sjamie break; 4578192895Sjamie if (pr == NULL) 4579192895Sjamie /* Assume address points to a valid prison. */ 4580192895Sjamie pr = (struct prison *)addr; 4581192895Sjamie } 4582191673Sjamie db_show_prison(pr); 4583185435Sbz} 4584191673Sjamie 4585185435Sbz#endif /* DDB */ 4586