kern_jail.c revision 301905
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: stable/10/sys/kern/kern_jail.c 301905 2016-06-15 01:49:01Z jamie $"); 31116182Sobrien 32193066Sjamie#include "opt_compat.h" 33185435Sbz#include "opt_ddb.h" 34185435Sbz#include "opt_inet.h" 35185435Sbz#include "opt_inet6.h" 36131177Spjd 3746155Sphk#include <sys/param.h> 3846155Sphk#include <sys/types.h> 3946155Sphk#include <sys/kernel.h> 4046155Sphk#include <sys/systm.h> 4146155Sphk#include <sys/errno.h> 4246155Sphk#include <sys/sysproto.h> 4346155Sphk#include <sys/malloc.h> 44192895Sjamie#include <sys/osd.h> 45164032Srwatson#include <sys/priv.h> 4646155Sphk#include <sys/proc.h> 47124882Srwatson#include <sys/taskqueue.h> 48177785Skib#include <sys/fcntl.h> 4946155Sphk#include <sys/jail.h> 5087275Srwatson#include <sys/lock.h> 5187275Srwatson#include <sys/mutex.h> 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); 133232598Straszstatic void prison_racct_modify(struct prison *pr); 134221362Straszstatic void prison_racct_detach(struct prison *pr); 135221362Strasz#endif 136185435Sbz#ifdef INET 137190466Sjamiestatic int _prison_check_ip4(struct prison *pr, struct in_addr *ia); 138192895Sjamiestatic int prison_restrict_ip4(struct prison *pr, struct in_addr *newip4); 139185435Sbz#endif 140185435Sbz#ifdef INET6 141190466Sjamiestatic int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6); 142192895Sjamiestatic int prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6); 143185435Sbz#endif 144113275Smike 145191673Sjamie/* Flags for prison_deref */ 146191673Sjamie#define PD_DEREF 0x01 147191673Sjamie#define PD_DEUREF 0x02 148191673Sjamie#define PD_LOCKED 0x04 149191673Sjamie#define PD_LIST_SLOCKED 0x08 150191673Sjamie#define PD_LIST_XLOCKED 0x10 151113275Smike 152192895Sjamie/* 153216861Sbz * Parameter names corresponding to PR_* flag values. Size values are for kvm 154216861Sbz * as we cannot figure out the size of a sparse array, or an array without a 155216861Sbz * terminating entry. 156192895Sjamie */ 157192895Sjamiestatic char *pr_flag_names[] = { 158192895Sjamie [0] = "persist", 159202468Sbz#ifdef INET 160202468Sbz [7] = "ip4.saddrsel", 161202468Sbz#endif 162202468Sbz#ifdef INET6 163202468Sbz [8] = "ip6.saddrsel", 164202468Sbz#endif 165192895Sjamie}; 166216861Sbzconst size_t pr_flag_names_size = sizeof(pr_flag_names); 167192895Sjamie 168192895Sjamiestatic char *pr_flag_nonames[] = { 169192895Sjamie [0] = "nopersist", 170202468Sbz#ifdef INET 171202468Sbz [7] = "ip4.nosaddrsel", 172202468Sbz#endif 173202468Sbz#ifdef INET6 174202468Sbz [8] = "ip6.nosaddrsel", 175202468Sbz#endif 176195870Sjamie}; 177216861Sbzconst size_t pr_flag_nonames_size = sizeof(pr_flag_nonames); 178195870Sjamie 179195870Sjamiestruct jailsys_flags { 180195870Sjamie const char *name; 181195870Sjamie unsigned disable; 182195870Sjamie unsigned new; 183195870Sjamie} pr_flag_jailsys[] = { 184195870Sjamie { "host", 0, PR_HOST }, 185195870Sjamie#ifdef VIMAGE 186195870Sjamie { "vnet", 0, PR_VNET }, 187195870Sjamie#endif 188192895Sjamie#ifdef INET 189195870Sjamie { "ip4", PR_IP4_USER | PR_IP4_DISABLE, PR_IP4_USER }, 190192895Sjamie#endif 191192895Sjamie#ifdef INET6 192195870Sjamie { "ip6", PR_IP6_USER | PR_IP6_DISABLE, PR_IP6_USER }, 193192895Sjamie#endif 194192895Sjamie}; 195216861Sbzconst size_t pr_flag_jailsys_size = sizeof(pr_flag_jailsys); 196192895Sjamie 197192895Sjamiestatic char *pr_allow_names[] = { 198192895Sjamie "allow.set_hostname", 199192895Sjamie "allow.sysvipc", 200192895Sjamie "allow.raw_sockets", 201192895Sjamie "allow.chflags", 202192895Sjamie "allow.mount", 203192895Sjamie "allow.quotas", 204192895Sjamie "allow.socket_af", 205232059Smm "allow.mount.devfs", 206232059Smm "allow.mount.nullfs", 207232186Smm "allow.mount.zfs", 208232278Smm "allow.mount.procfs", 209254741Sdelphij "allow.mount.tmpfs", 210277985Sjamie "allow.mount.fdescfs", 211295951Saraujo "allow.mount.linprocfs", 212295951Saraujo "allow.mount.linsysfs", 213192895Sjamie}; 214216861Sbzconst size_t pr_allow_names_size = sizeof(pr_allow_names); 215192895Sjamie 216192895Sjamiestatic char *pr_allow_nonames[] = { 217192895Sjamie "allow.noset_hostname", 218192895Sjamie "allow.nosysvipc", 219192895Sjamie "allow.noraw_sockets", 220192895Sjamie "allow.nochflags", 221192895Sjamie "allow.nomount", 222192895Sjamie "allow.noquotas", 223192895Sjamie "allow.nosocket_af", 224232059Smm "allow.mount.nodevfs", 225232059Smm "allow.mount.nonullfs", 226232186Smm "allow.mount.nozfs", 227232278Smm "allow.mount.noprocfs", 228254741Sdelphij "allow.mount.notmpfs", 229277985Sjamie "allow.mount.nofdescfs", 230295951Saraujo "allow.mount.nolinprocfs", 231295951Saraujo "allow.mount.nolinsysfs", 232192895Sjamie}; 233216861Sbzconst size_t pr_allow_nonames_size = sizeof(pr_allow_nonames); 234192895Sjamie 235196002Sjamie#define JAIL_DEFAULT_ALLOW PR_ALLOW_SET_HOSTNAME 236196002Sjamie#define JAIL_DEFAULT_ENFORCE_STATFS 2 237232059Smm#define JAIL_DEFAULT_DEVFS_RSNUM 0 238192895Sjamiestatic unsigned jail_default_allow = JAIL_DEFAULT_ALLOW; 239196002Sjamiestatic int jail_default_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 240231267Smmstatic int jail_default_devfs_rsnum = JAIL_DEFAULT_DEVFS_RSNUM; 241192895Sjamie#if defined(INET) || defined(INET6) 242193865Sjamiestatic unsigned jail_max_af_ips = 255; 243192895Sjamie#endif 244192895Sjamie 245280632Sian/* 246280632Sian * Initialize the parts of prison0 that can't be static-initialized with 247280632Sian * constants. This is called from proc0_init() after creating thread0 cpuset. 248280632Sian */ 249280632Sianvoid 250280632Sianprison0_init(void) 251280632Sian{ 252280632Sian 253280632Sian prison0.pr_cpuset = cpuset_ref(thread0.td_cpuset); 254280632Sian prison0.pr_osreldate = osreldate; 255280632Sian strlcpy(prison0.pr_osrelease, osrelease, sizeof(prison0.pr_osrelease)); 256280632Sian} 257280632Sian 258192895Sjamie#ifdef INET 259185435Sbzstatic int 260185435Sbzqcmp_v4(const void *ip1, const void *ip2) 261185435Sbz{ 262185435Sbz in_addr_t iaa, iab; 263185435Sbz 264185435Sbz /* 265185435Sbz * We need to compare in HBO here to get the list sorted as expected 266185435Sbz * by the result of the code. Sorting NBO addresses gives you 267185435Sbz * interesting results. If you do not understand, do not try. 268185435Sbz */ 269185435Sbz iaa = ntohl(((const struct in_addr *)ip1)->s_addr); 270185435Sbz iab = ntohl(((const struct in_addr *)ip2)->s_addr); 271185435Sbz 272185435Sbz /* 273185435Sbz * Do not simply return the difference of the two numbers, the int is 274185435Sbz * not wide enough. 275185435Sbz */ 276185435Sbz if (iaa > iab) 277185435Sbz return (1); 278185435Sbz else if (iaa < iab) 279185435Sbz return (-1); 280185435Sbz else 281185435Sbz return (0); 282185435Sbz} 283185435Sbz#endif 284185435Sbz 285185435Sbz#ifdef INET6 286185435Sbzstatic int 287185435Sbzqcmp_v6(const void *ip1, const void *ip2) 288185435Sbz{ 289185435Sbz const struct in6_addr *ia6a, *ia6b; 290185435Sbz int i, rc; 291185435Sbz 292185435Sbz ia6a = (const struct in6_addr *)ip1; 293185435Sbz ia6b = (const struct in6_addr *)ip2; 294185435Sbz 295185435Sbz rc = 0; 296190466Sjamie for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) { 297185435Sbz if (ia6a->s6_addr[i] > ia6b->s6_addr[i]) 298185435Sbz rc = 1; 299185435Sbz else if (ia6a->s6_addr[i] < ia6b->s6_addr[i]) 300185435Sbz rc = -1; 301185435Sbz } 302185435Sbz return (rc); 303185435Sbz} 304185435Sbz#endif 305185435Sbz 306191673Sjamie/* 307191673Sjamie * struct jail_args { 308191673Sjamie * struct jail *jail; 309191673Sjamie * }; 310191673Sjamie */ 311191673Sjamieint 312225617Skmacysys_jail(struct thread *td, struct jail_args *uap) 313185435Sbz{ 314191673Sjamie uint32_t version; 315191673Sjamie int error; 316192895Sjamie struct jail j; 317185435Sbz 318191673Sjamie error = copyin(uap->jail, &version, sizeof(uint32_t)); 319191673Sjamie if (error) 320191673Sjamie return (error); 321185435Sbz 322191673Sjamie switch (version) { 323191673Sjamie case 0: 324191673Sjamie { 325191673Sjamie struct jail_v0 j0; 326185435Sbz 327192895Sjamie /* FreeBSD single IPv4 jails. */ 328192895Sjamie bzero(&j, sizeof(struct jail)); 329191673Sjamie error = copyin(uap->jail, &j0, sizeof(struct jail_v0)); 330191673Sjamie if (error) 331191673Sjamie return (error); 332192895Sjamie j.version = j0.version; 333192895Sjamie j.path = j0.path; 334192895Sjamie j.hostname = j0.hostname; 335258929Speter j.ip4s = htonl(j0.ip_number); /* jail_v0 is host order */ 336191673Sjamie break; 337191673Sjamie } 338191673Sjamie 339191673Sjamie case 1: 340185435Sbz /* 341191673Sjamie * Version 1 was used by multi-IPv4 jail implementations 342191673Sjamie * that never made it into the official kernel. 343185435Sbz */ 344191673Sjamie return (EINVAL); 345185435Sbz 346191673Sjamie case 2: /* JAIL_API_VERSION */ 347191673Sjamie /* FreeBSD multi-IPv4/IPv6,noIP jails. */ 348191673Sjamie error = copyin(uap->jail, &j, sizeof(struct jail)); 349191673Sjamie if (error) 350191673Sjamie return (error); 351192895Sjamie break; 352192895Sjamie 353192895Sjamie default: 354192895Sjamie /* Sci-Fi jails are not supported, sorry. */ 355192895Sjamie return (EINVAL); 356192895Sjamie } 357192895Sjamie return (kern_jail(td, &j)); 358192895Sjamie} 359192895Sjamie 360192895Sjamieint 361192895Sjamiekern_jail(struct thread *td, struct jail *j) 362192895Sjamie{ 363193865Sjamie struct iovec optiov[2 * (4 364193865Sjamie + sizeof(pr_allow_names) / sizeof(pr_allow_names[0]) 365193865Sjamie#ifdef INET 366193865Sjamie + 1 367193865Sjamie#endif 368193865Sjamie#ifdef INET6 369193865Sjamie + 1 370193865Sjamie#endif 371193865Sjamie )]; 372192895Sjamie struct uio opt; 373192895Sjamie char *u_path, *u_hostname, *u_name; 374185435Sbz#ifdef INET 375193865Sjamie uint32_t ip4s; 376192895Sjamie struct in_addr *u_ip4; 377192895Sjamie#endif 378192895Sjamie#ifdef INET6 379192895Sjamie struct in6_addr *u_ip6; 380192895Sjamie#endif 381192895Sjamie size_t tmplen; 382192895Sjamie int error, enforce_statfs, fi; 383192895Sjamie 384192895Sjamie bzero(&optiov, sizeof(optiov)); 385192895Sjamie opt.uio_iov = optiov; 386192895Sjamie opt.uio_iovcnt = 0; 387192895Sjamie opt.uio_offset = -1; 388192895Sjamie opt.uio_resid = -1; 389192895Sjamie opt.uio_segflg = UIO_SYSSPACE; 390192895Sjamie opt.uio_rw = UIO_READ; 391192895Sjamie opt.uio_td = td; 392192895Sjamie 393192895Sjamie /* Set permissions for top-level jails from sysctls. */ 394192895Sjamie if (!jailed(td->td_ucred)) { 395192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / 396192895Sjamie sizeof(pr_allow_names[0]); fi++) { 397192895Sjamie optiov[opt.uio_iovcnt].iov_base = 398192895Sjamie (jail_default_allow & (1 << fi)) 399192895Sjamie ? pr_allow_names[fi] : pr_allow_nonames[fi]; 400192895Sjamie optiov[opt.uio_iovcnt].iov_len = 401192895Sjamie strlen(optiov[opt.uio_iovcnt].iov_base) + 1; 402192895Sjamie opt.uio_iovcnt += 2; 403192895Sjamie } 404192895Sjamie optiov[opt.uio_iovcnt].iov_base = "enforce_statfs"; 405192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("enforce_statfs"); 406192895Sjamie opt.uio_iovcnt++; 407192895Sjamie enforce_statfs = jail_default_enforce_statfs; 408192895Sjamie optiov[opt.uio_iovcnt].iov_base = &enforce_statfs; 409192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof(enforce_statfs); 410192895Sjamie opt.uio_iovcnt++; 411192895Sjamie } 412192895Sjamie 413192895Sjamie tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN; 414192895Sjamie#ifdef INET 415192895Sjamie ip4s = (j->version == 0) ? 1 : j->ip4s; 416192895Sjamie if (ip4s > jail_max_af_ips) 417192895Sjamie return (EINVAL); 418192895Sjamie tmplen += ip4s * sizeof(struct in_addr); 419191673Sjamie#else 420192895Sjamie if (j->ip4s > 0) 421192895Sjamie return (EINVAL); 422191673Sjamie#endif 423191673Sjamie#ifdef INET6 424192895Sjamie if (j->ip6s > jail_max_af_ips) 425192895Sjamie return (EINVAL); 426192895Sjamie tmplen += j->ip6s * sizeof(struct in6_addr); 427191673Sjamie#else 428192895Sjamie if (j->ip6s > 0) 429192895Sjamie return (EINVAL); 430191673Sjamie#endif 431192895Sjamie u_path = malloc(tmplen, M_TEMP, M_WAITOK); 432192895Sjamie u_hostname = u_path + MAXPATHLEN; 433192895Sjamie u_name = u_hostname + MAXHOSTNAMELEN; 434191673Sjamie#ifdef INET 435192895Sjamie u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN); 436191673Sjamie#endif 437191673Sjamie#ifdef INET6 438191673Sjamie#ifdef INET 439192895Sjamie u_ip6 = (struct in6_addr *)(u_ip4 + ip4s); 440191673Sjamie#else 441192895Sjamie u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN); 442191673Sjamie#endif 443191673Sjamie#endif 444192895Sjamie optiov[opt.uio_iovcnt].iov_base = "path"; 445192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("path"); 446192895Sjamie opt.uio_iovcnt++; 447192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_path; 448192895Sjamie error = copyinstr(j->path, u_path, MAXPATHLEN, 449192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 450192895Sjamie if (error) { 451192895Sjamie free(u_path, M_TEMP); 452192895Sjamie return (error); 453192895Sjamie } 454192895Sjamie opt.uio_iovcnt++; 455192895Sjamie optiov[opt.uio_iovcnt].iov_base = "host.hostname"; 456192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("host.hostname"); 457192895Sjamie opt.uio_iovcnt++; 458192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_hostname; 459192895Sjamie error = copyinstr(j->hostname, u_hostname, MAXHOSTNAMELEN, 460192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 461192895Sjamie if (error) { 462192895Sjamie free(u_path, M_TEMP); 463192895Sjamie return (error); 464192895Sjamie } 465192895Sjamie opt.uio_iovcnt++; 466192895Sjamie if (j->jailname != NULL) { 467192895Sjamie optiov[opt.uio_iovcnt].iov_base = "name"; 468192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("name"); 469192895Sjamie opt.uio_iovcnt++; 470192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_name; 471192895Sjamie error = copyinstr(j->jailname, u_name, MAXHOSTNAMELEN, 472192895Sjamie &optiov[opt.uio_iovcnt].iov_len); 473191673Sjamie if (error) { 474191673Sjamie free(u_path, M_TEMP); 475191673Sjamie return (error); 476191673Sjamie } 477192895Sjamie opt.uio_iovcnt++; 478192895Sjamie } 479191673Sjamie#ifdef INET 480192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip4.addr"; 481192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr"); 482192895Sjamie opt.uio_iovcnt++; 483192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip4; 484192895Sjamie optiov[opt.uio_iovcnt].iov_len = ip4s * sizeof(struct in_addr); 485192895Sjamie if (j->version == 0) 486192895Sjamie u_ip4->s_addr = j->ip4s; 487192895Sjamie else { 488192895Sjamie error = copyin(j->ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len); 489191673Sjamie if (error) { 490191673Sjamie free(u_path, M_TEMP); 491191673Sjamie return (error); 492191673Sjamie } 493192895Sjamie } 494192895Sjamie opt.uio_iovcnt++; 495185435Sbz#endif 496185435Sbz#ifdef INET6 497192895Sjamie optiov[opt.uio_iovcnt].iov_base = "ip6.addr"; 498192895Sjamie optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr"); 499192895Sjamie opt.uio_iovcnt++; 500192895Sjamie optiov[opt.uio_iovcnt].iov_base = u_ip6; 501192895Sjamie optiov[opt.uio_iovcnt].iov_len = j->ip6s * sizeof(struct in6_addr); 502192895Sjamie error = copyin(j->ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len); 503192895Sjamie if (error) { 504192895Sjamie free(u_path, M_TEMP); 505192895Sjamie return (error); 506192895Sjamie } 507192895Sjamie opt.uio_iovcnt++; 508185435Sbz#endif 509192895Sjamie KASSERT(opt.uio_iovcnt <= sizeof(optiov) / sizeof(optiov[0]), 510192895Sjamie ("kern_jail: too many iovecs (%d)", opt.uio_iovcnt)); 511191673Sjamie error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH); 512191673Sjamie free(u_path, M_TEMP); 513191673Sjamie return (error); 514185435Sbz} 515185435Sbz 516192895Sjamie 517191673Sjamie/* 518191673Sjamie * struct jail_set_args { 519191673Sjamie * struct iovec *iovp; 520191673Sjamie * unsigned int iovcnt; 521191673Sjamie * int flags; 522191673Sjamie * }; 523191673Sjamie */ 524191673Sjamieint 525225617Skmacysys_jail_set(struct thread *td, struct jail_set_args *uap) 526185435Sbz{ 527191673Sjamie struct uio *auio; 528191673Sjamie int error; 529191673Sjamie 530191673Sjamie /* Check that we have an even number of iovecs. */ 531191673Sjamie if (uap->iovcnt & 1) 532191673Sjamie return (EINVAL); 533191673Sjamie 534191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 535191673Sjamie if (error) 536191673Sjamie return (error); 537191673Sjamie error = kern_jail_set(td, auio, uap->flags); 538191673Sjamie free(auio, M_IOV); 539191673Sjamie return (error); 540191673Sjamie} 541191673Sjamie 542191673Sjamieint 543191673Sjamiekern_jail_set(struct thread *td, struct uio *optuio, int flags) 544191673Sjamie{ 545191673Sjamie struct nameidata nd; 546185435Sbz#ifdef INET 547190466Sjamie struct in_addr *ip4; 548185435Sbz#endif 549185435Sbz#ifdef INET6 550185435Sbz struct in6_addr *ip6; 551185435Sbz#endif 552191673Sjamie struct vfsopt *opt; 553191673Sjamie struct vfsoptlist *opts; 554196135Sbz struct prison *pr, *deadpr, *mypr, *ppr, *tpr; 555191673Sjamie struct vnode *root; 556196835Sjamie char *domain, *errmsg, *host, *name, *namelc, *p, *path, *uuid; 557280632Sian char *g_path, *osrelstr; 558192895Sjamie#if defined(INET) || defined(INET6) 559196135Sbz struct prison *tppr; 560191673Sjamie void *op; 561192895Sjamie#endif 562193066Sjamie unsigned long hid; 563298833Sjamie size_t namelen, onamelen, pnamelen; 564298833Sjamie int born, created, cuflags, descend, enforce; 565298833Sjamie int error, errmsg_len, errmsg_pos; 566231267Smm int gotchildmax, gotenforce, gothid, gotrsnum, gotslevel; 567195870Sjamie int fi, jid, jsys, len, level; 568280632Sian int childmax, osreldt, rsnum, slevel; 569230129Smm int fullpath_disabled; 570191673Sjamie#if defined(INET) || defined(INET6) 571192895Sjamie int ii, ij; 572191673Sjamie#endif 573191673Sjamie#ifdef INET 574195974Sjamie int ip4s, redo_ip4; 575191673Sjamie#endif 576191673Sjamie#ifdef INET6 577195974Sjamie int ip6s, redo_ip6; 578191673Sjamie#endif 579224290Smckusick uint64_t pr_allow, ch_allow, pr_flags, ch_flags; 580224290Smckusick unsigned tallow; 581191673Sjamie char numbuf[12]; 582185435Sbz 583191673Sjamie error = priv_check(td, PRIV_JAIL_SET); 584191673Sjamie if (!error && (flags & JAIL_ATTACH)) 585191673Sjamie error = priv_check(td, PRIV_JAIL_ATTACH); 586191673Sjamie if (error) 587191673Sjamie return (error); 588298833Sjamie mypr = td->td_ucred->cr_prison; 589194762Sjamie if ((flags & JAIL_CREATE) && mypr->pr_childmax == 0) 590192895Sjamie return (EPERM); 591191673Sjamie if (flags & ~JAIL_SET_MASK) 592191673Sjamie return (EINVAL); 593191673Sjamie 594185435Sbz /* 595191673Sjamie * Check all the parameters before committing to anything. Not all 596191673Sjamie * errors can be caught early, but we may as well try. Also, this 597191673Sjamie * takes care of some expensive stuff (path lookup) before getting 598191673Sjamie * the allprison lock. 599185435Sbz * 600191673Sjamie * XXX Jails are not filesystems, and jail parameters are not mount 601191673Sjamie * options. But it makes more sense to re-use the vfsopt code 602191673Sjamie * than duplicate it under a different name. 603185435Sbz */ 604191673Sjamie error = vfs_buildopts(optuio, &opts); 605191673Sjamie if (error) 606191673Sjamie return (error); 607185435Sbz#ifdef INET 608185435Sbz ip4 = NULL; 609185435Sbz#endif 610185435Sbz#ifdef INET6 611185435Sbz ip6 = NULL; 612185435Sbz#endif 613230407Smm g_path = NULL; 614191673Sjamie 615298833Sjamie cuflags = flags & (JAIL_CREATE | JAIL_UPDATE); 616298833Sjamie if (!cuflags) { 617298833Sjamie error = EINVAL; 618298833Sjamie vfs_opterror(opts, "no valid operation (create or update)"); 619298833Sjamie goto done_errmsg; 620298833Sjamie } 621298833Sjamie 622191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 623191673Sjamie if (error == ENOENT) 624191673Sjamie jid = 0; 625191673Sjamie else if (error != 0) 626191673Sjamie goto done_free; 627191673Sjamie 628191673Sjamie error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel)); 629191673Sjamie if (error == ENOENT) 630191673Sjamie gotslevel = 0; 631191673Sjamie else if (error != 0) 632191673Sjamie goto done_free; 633191673Sjamie else 634191673Sjamie gotslevel = 1; 635191673Sjamie 636194762Sjamie error = 637194762Sjamie vfs_copyopt(opts, "children.max", &childmax, sizeof(childmax)); 638194762Sjamie if (error == ENOENT) 639194762Sjamie gotchildmax = 0; 640194762Sjamie else if (error != 0) 641194762Sjamie goto done_free; 642194762Sjamie else 643194762Sjamie gotchildmax = 1; 644194762Sjamie 645192895Sjamie error = vfs_copyopt(opts, "enforce_statfs", &enforce, sizeof(enforce)); 646212436Sjamie if (error == ENOENT) 647212436Sjamie gotenforce = 0; 648212436Sjamie else if (error != 0) 649192895Sjamie goto done_free; 650212436Sjamie else if (enforce < 0 || enforce > 2) { 651212436Sjamie error = EINVAL; 652212436Sjamie goto done_free; 653212436Sjamie } else 654212436Sjamie gotenforce = 1; 655192895Sjamie 656231267Smm error = vfs_copyopt(opts, "devfs_ruleset", &rsnum, sizeof(rsnum)); 657231267Smm if (error == ENOENT) 658231267Smm gotrsnum = 0; 659231267Smm else if (error != 0) 660231267Smm goto done_free; 661231267Smm else 662231267Smm gotrsnum = 1; 663231267Smm 664191673Sjamie pr_flags = ch_flags = 0; 665192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 666192895Sjamie fi++) { 667192895Sjamie if (pr_flag_names[fi] == NULL) 668192895Sjamie continue; 669192895Sjamie vfs_flagopt(opts, pr_flag_names[fi], &pr_flags, 1 << fi); 670192895Sjamie vfs_flagopt(opts, pr_flag_nonames[fi], &ch_flags, 1 << fi); 671192895Sjamie } 672191673Sjamie ch_flags |= pr_flags; 673195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 674195870Sjamie fi++) { 675195870Sjamie error = vfs_copyopt(opts, pr_flag_jailsys[fi].name, &jsys, 676195870Sjamie sizeof(jsys)); 677195870Sjamie if (error == ENOENT) 678195870Sjamie continue; 679195870Sjamie if (error != 0) 680195870Sjamie goto done_free; 681195870Sjamie switch (jsys) { 682195870Sjamie case JAIL_SYS_DISABLE: 683195870Sjamie if (!pr_flag_jailsys[fi].disable) { 684195870Sjamie error = EINVAL; 685195870Sjamie goto done_free; 686195870Sjamie } 687195870Sjamie pr_flags |= pr_flag_jailsys[fi].disable; 688195870Sjamie break; 689195870Sjamie case JAIL_SYS_NEW: 690195870Sjamie pr_flags |= pr_flag_jailsys[fi].new; 691195870Sjamie break; 692195870Sjamie case JAIL_SYS_INHERIT: 693195870Sjamie break; 694195870Sjamie default: 695195870Sjamie error = EINVAL; 696195870Sjamie goto done_free; 697195870Sjamie } 698195870Sjamie ch_flags |= 699195870Sjamie pr_flag_jailsys[fi].new | pr_flag_jailsys[fi].disable; 700195870Sjamie } 701211085Sjamie if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE 702211085Sjamie && !(pr_flags & PR_PERSIST)) { 703211085Sjamie error = EINVAL; 704211085Sjamie vfs_opterror(opts, "new jail must persist or attach"); 705211085Sjamie goto done_errmsg; 706211085Sjamie } 707194251Sjamie#ifdef VIMAGE 708194251Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_VNET)) { 709194251Sjamie error = EINVAL; 710194251Sjamie vfs_opterror(opts, "vnet cannot be changed after creation"); 711194251Sjamie goto done_errmsg; 712194251Sjamie } 713194251Sjamie#endif 714195974Sjamie#ifdef INET 715195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP4_USER)) { 716195974Sjamie error = EINVAL; 717195974Sjamie vfs_opterror(opts, "ip4 cannot be changed after creation"); 718195974Sjamie goto done_errmsg; 719195974Sjamie } 720195974Sjamie#endif 721195974Sjamie#ifdef INET6 722195974Sjamie if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP6_USER)) { 723195974Sjamie error = EINVAL; 724195974Sjamie vfs_opterror(opts, "ip6 cannot be changed after creation"); 725195974Sjamie goto done_errmsg; 726195974Sjamie } 727195974Sjamie#endif 728191673Sjamie 729192895Sjamie pr_allow = ch_allow = 0; 730192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 731192895Sjamie fi++) { 732192895Sjamie vfs_flagopt(opts, pr_allow_names[fi], &pr_allow, 1 << fi); 733192895Sjamie vfs_flagopt(opts, pr_allow_nonames[fi], &ch_allow, 1 << fi); 734192895Sjamie } 735192895Sjamie ch_allow |= pr_allow; 736192895Sjamie 737191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 738191673Sjamie if (error == ENOENT) 739191673Sjamie name = NULL; 740191673Sjamie else if (error != 0) 741191673Sjamie goto done_free; 742191673Sjamie else { 743191673Sjamie if (len == 0 || name[len - 1] != '\0') { 744191673Sjamie error = EINVAL; 745191673Sjamie goto done_free; 746191673Sjamie } 747191673Sjamie if (len > MAXHOSTNAMELEN) { 748191673Sjamie error = ENAMETOOLONG; 749191673Sjamie goto done_free; 750191673Sjamie } 751191673Sjamie } 752191673Sjamie 753191673Sjamie error = vfs_getopt(opts, "host.hostname", (void **)&host, &len); 754191673Sjamie if (error == ENOENT) 755191673Sjamie host = NULL; 756191673Sjamie else if (error != 0) 757191673Sjamie goto done_free; 758191673Sjamie else { 759193066Sjamie ch_flags |= PR_HOST; 760193066Sjamie pr_flags |= PR_HOST; 761191673Sjamie if (len == 0 || host[len - 1] != '\0') { 762191673Sjamie error = EINVAL; 763191673Sjamie goto done_free; 764191673Sjamie } 765191673Sjamie if (len > MAXHOSTNAMELEN) { 766191673Sjamie error = ENAMETOOLONG; 767191673Sjamie goto done_free; 768191673Sjamie } 769191673Sjamie } 770191673Sjamie 771193066Sjamie error = vfs_getopt(opts, "host.domainname", (void **)&domain, &len); 772193066Sjamie if (error == ENOENT) 773193066Sjamie domain = NULL; 774193066Sjamie else if (error != 0) 775193066Sjamie goto done_free; 776193066Sjamie else { 777193066Sjamie ch_flags |= PR_HOST; 778193066Sjamie pr_flags |= PR_HOST; 779193066Sjamie if (len == 0 || domain[len - 1] != '\0') { 780193066Sjamie error = EINVAL; 781193066Sjamie goto done_free; 782193066Sjamie } 783193066Sjamie if (len > MAXHOSTNAMELEN) { 784193066Sjamie error = ENAMETOOLONG; 785193066Sjamie goto done_free; 786193066Sjamie } 787193066Sjamie } 788193066Sjamie 789193066Sjamie error = vfs_getopt(opts, "host.hostuuid", (void **)&uuid, &len); 790193066Sjamie if (error == ENOENT) 791193066Sjamie uuid = NULL; 792193066Sjamie else if (error != 0) 793193066Sjamie goto done_free; 794193066Sjamie else { 795193066Sjamie ch_flags |= PR_HOST; 796193066Sjamie pr_flags |= PR_HOST; 797193066Sjamie if (len == 0 || uuid[len - 1] != '\0') { 798193066Sjamie error = EINVAL; 799193066Sjamie goto done_free; 800193066Sjamie } 801193066Sjamie if (len > HOSTUUIDLEN) { 802193066Sjamie error = ENAMETOOLONG; 803193066Sjamie goto done_free; 804193066Sjamie } 805193066Sjamie } 806193066Sjamie 807205014Snwhitehorn#ifdef COMPAT_FREEBSD32 808217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 809193066Sjamie uint32_t hid32; 810193066Sjamie 811193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid32, sizeof(hid32)); 812193066Sjamie hid = hid32; 813193066Sjamie } else 814193066Sjamie#endif 815193066Sjamie error = vfs_copyopt(opts, "host.hostid", &hid, sizeof(hid)); 816193066Sjamie if (error == ENOENT) 817193066Sjamie gothid = 0; 818193066Sjamie else if (error != 0) 819193066Sjamie goto done_free; 820193066Sjamie else { 821193066Sjamie gothid = 1; 822193066Sjamie ch_flags |= PR_HOST; 823193066Sjamie pr_flags |= PR_HOST; 824193066Sjamie } 825193066Sjamie 826185435Sbz#ifdef INET 827191673Sjamie error = vfs_getopt(opts, "ip4.addr", &op, &ip4s); 828191673Sjamie if (error == ENOENT) 829277279Sjamie ip4s = 0; 830191673Sjamie else if (error != 0) 831191673Sjamie goto done_free; 832191673Sjamie else if (ip4s & (sizeof(*ip4) - 1)) { 833191673Sjamie error = EINVAL; 834191673Sjamie goto done_free; 835192895Sjamie } else { 836195870Sjamie ch_flags |= PR_IP4_USER | PR_IP4_DISABLE; 837195870Sjamie if (ip4s == 0) 838195870Sjamie pr_flags |= PR_IP4_USER | PR_IP4_DISABLE; 839195870Sjamie else { 840195870Sjamie pr_flags = (pr_flags & ~PR_IP4_DISABLE) | PR_IP4_USER; 841192895Sjamie ip4s /= sizeof(*ip4); 842192895Sjamie if (ip4s > jail_max_af_ips) { 843185435Sbz error = EINVAL; 844192895Sjamie vfs_opterror(opts, "too many IPv4 addresses"); 845192895Sjamie goto done_errmsg; 846185435Sbz } 847195974Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 848192895Sjamie bcopy(op, ip4, ip4s * sizeof(*ip4)); 849192895Sjamie /* 850192895Sjamie * IP addresses are all sorted but ip[0] to preserve 851192895Sjamie * the primary IP address as given from userland. 852192895Sjamie * This special IP is used for unbound outgoing 853202116Sbz * connections as well for "loopback" traffic in case 854202116Sbz * source address selection cannot find any more fitting 855202116Sbz * address to connect from. 856192895Sjamie */ 857192895Sjamie if (ip4s > 1) 858192895Sjamie qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4); 859192895Sjamie /* 860192895Sjamie * Check for duplicate addresses and do some simple 861192895Sjamie * zero and broadcast checks. If users give other bogus 862192895Sjamie * addresses it is their problem. 863192895Sjamie * 864192895Sjamie * We do not have to care about byte order for these 865192895Sjamie * checks so we will do them in NBO. 866192895Sjamie */ 867192895Sjamie for (ii = 0; ii < ip4s; ii++) { 868192895Sjamie if (ip4[ii].s_addr == INADDR_ANY || 869192895Sjamie ip4[ii].s_addr == INADDR_BROADCAST) { 870192895Sjamie error = EINVAL; 871192895Sjamie goto done_free; 872192895Sjamie } 873192895Sjamie if ((ii+1) < ip4s && 874192895Sjamie (ip4[0].s_addr == ip4[ii+1].s_addr || 875192895Sjamie ip4[ii].s_addr == ip4[ii+1].s_addr)) { 876192895Sjamie error = EINVAL; 877192895Sjamie goto done_free; 878192895Sjamie } 879192895Sjamie } 880185435Sbz } 881191673Sjamie } 882191673Sjamie#endif 883185435Sbz 884185435Sbz#ifdef INET6 885191673Sjamie error = vfs_getopt(opts, "ip6.addr", &op, &ip6s); 886191673Sjamie if (error == ENOENT) 887277279Sjamie ip6s = 0; 888191673Sjamie else if (error != 0) 889191673Sjamie goto done_free; 890191673Sjamie else if (ip6s & (sizeof(*ip6) - 1)) { 891191673Sjamie error = EINVAL; 892191673Sjamie goto done_free; 893192895Sjamie } else { 894195870Sjamie ch_flags |= PR_IP6_USER | PR_IP6_DISABLE; 895195870Sjamie if (ip6s == 0) 896195870Sjamie pr_flags |= PR_IP6_USER | PR_IP6_DISABLE; 897195870Sjamie else { 898195870Sjamie pr_flags = (pr_flags & ~PR_IP6_DISABLE) | PR_IP6_USER; 899192895Sjamie ip6s /= sizeof(*ip6); 900192895Sjamie if (ip6s > jail_max_af_ips) { 901185435Sbz error = EINVAL; 902192895Sjamie vfs_opterror(opts, "too many IPv6 addresses"); 903192895Sjamie goto done_errmsg; 904185435Sbz } 905195974Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 906192895Sjamie bcopy(op, ip6, ip6s * sizeof(*ip6)); 907192895Sjamie if (ip6s > 1) 908192895Sjamie qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6); 909192895Sjamie for (ii = 0; ii < ip6s; ii++) { 910192895Sjamie if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) { 911192895Sjamie error = EINVAL; 912192895Sjamie goto done_free; 913192895Sjamie } 914192895Sjamie if ((ii+1) < ip6s && 915192895Sjamie (IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) || 916192895Sjamie IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1]))) 917192895Sjamie { 918192895Sjamie error = EINVAL; 919192895Sjamie goto done_free; 920192895Sjamie } 921192895Sjamie } 922185435Sbz } 923191673Sjamie } 924185435Sbz#endif 925185435Sbz 926195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 927195945Sjamie if ((ch_flags & PR_VNET) && (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 928195945Sjamie error = EINVAL; 929195945Sjamie vfs_opterror(opts, 930195945Sjamie "vnet jails cannot have IP address restrictions"); 931195945Sjamie goto done_errmsg; 932195945Sjamie } 933195945Sjamie#endif 934195945Sjamie 935230143Smm fullpath_disabled = 0; 936191673Sjamie root = NULL; 937191673Sjamie error = vfs_getopt(opts, "path", (void **)&path, &len); 938191673Sjamie if (error == ENOENT) 939191673Sjamie path = NULL; 940191673Sjamie else if (error != 0) 941191673Sjamie goto done_free; 942191673Sjamie else { 943191673Sjamie if (flags & JAIL_UPDATE) { 944191673Sjamie error = EINVAL; 945191673Sjamie vfs_opterror(opts, 946191673Sjamie "path cannot be changed after creation"); 947191673Sjamie goto done_errmsg; 948191673Sjamie } 949191673Sjamie if (len == 0 || path[len - 1] != '\0') { 950191673Sjamie error = EINVAL; 951191673Sjamie goto done_free; 952191673Sjamie } 953241896Skib NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, 954230129Smm path, td); 955230129Smm error = namei(&nd); 956230129Smm if (error) 957230129Smm goto done_free; 958230129Smm root = nd.ni_vp; 959230129Smm NDFREE(&nd, NDF_ONLY_PNBUF); 960230407Smm g_path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 961230407Smm strlcpy(g_path, path, MAXPATHLEN); 962230407Smm error = vn_path_to_global_path(td, root, g_path, MAXPATHLEN); 963230407Smm if (error == 0) 964230407Smm path = g_path; 965230407Smm else if (error == ENODEV) { 966230129Smm /* proceed if sysctl debug.disablefullpath == 1 */ 967230129Smm fullpath_disabled = 1; 968230129Smm if (len < 2 || (len == 2 && path[0] == '/')) 969230129Smm path = NULL; 970230407Smm } else { 971230129Smm /* exit on other errors */ 972230129Smm goto done_free; 973230129Smm } 974230129Smm if (root->v_type != VDIR) { 975230129Smm error = ENOTDIR; 976230129Smm vput(root); 977230129Smm goto done_free; 978230129Smm } 979230129Smm VOP_UNLOCK(root, 0); 980230129Smm if (fullpath_disabled) { 981192895Sjamie /* Leave room for a real-root full pathname. */ 982192895Sjamie if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/") 983192895Sjamie ? strlen(mypr->pr_path) : 0) > MAXPATHLEN) { 984192895Sjamie error = ENAMETOOLONG; 985192895Sjamie goto done_free; 986192895Sjamie } 987191673Sjamie } 988191673Sjamie } 989185435Sbz 990280632Sian error = vfs_getopt(opts, "osrelease", (void **)&osrelstr, &len); 991280632Sian if (error == ENOENT) 992280632Sian osrelstr = NULL; 993280632Sian else if (error != 0) 994280632Sian goto done_free; 995280632Sian else { 996280632Sian if (flags & JAIL_UPDATE) { 997280632Sian error = EINVAL; 998280632Sian vfs_opterror(opts, 999280632Sian "osrelease cannot be changed after creation"); 1000280632Sian goto done_errmsg; 1001280632Sian } 1002280632Sian if (len == 0 || len >= OSRELEASELEN) { 1003280632Sian error = EINVAL; 1004280632Sian vfs_opterror(opts, 1005280632Sian "osrelease string must be 1-%d bytes long", 1006280632Sian OSRELEASELEN - 1); 1007280632Sian goto done_errmsg; 1008280632Sian } 1009280632Sian } 1010280632Sian 1011280632Sian error = vfs_copyopt(opts, "osreldate", &osreldt, sizeof(osreldt)); 1012280632Sian if (error == ENOENT) 1013280632Sian osreldt = 0; 1014280632Sian else if (error != 0) 1015280632Sian goto done_free; 1016280632Sian else { 1017280632Sian if (flags & JAIL_UPDATE) { 1018280632Sian error = EINVAL; 1019280632Sian vfs_opterror(opts, 1020280632Sian "osreldate cannot be changed after creation"); 1021280632Sian goto done_errmsg; 1022280632Sian } 1023280632Sian if (osreldt == 0) { 1024280632Sian error = EINVAL; 1025280632Sian vfs_opterror(opts, "osreldate cannot be 0"); 1026280632Sian goto done_errmsg; 1027280632Sian } 1028280632Sian } 1029280632Sian 1030191673Sjamie /* 1031298833Sjamie * Find the specified jail, or at least its parent. 1032191673Sjamie * This abuses the file error codes ENOENT and EEXIST. 1033185435Sbz */ 1034191673Sjamie pr = NULL; 1035298833Sjamie ppr = mypr; 1036196835Sjamie if (cuflags == JAIL_CREATE && jid == 0 && name != NULL) { 1037196835Sjamie namelc = strrchr(name, '.'); 1038196835Sjamie jid = strtoul(namelc != NULL ? namelc + 1 : name, &p, 10); 1039196835Sjamie if (*p != '\0') 1040196835Sjamie jid = 0; 1041196835Sjamie } 1042298833Sjamie sx_xlock(&allprison_lock); 1043191673Sjamie if (jid != 0) { 1044192895Sjamie /* 1045192895Sjamie * See if a requested jid already exists. There is an 1046192895Sjamie * information leak here if the jid exists but is not within 1047192895Sjamie * the caller's jail hierarchy. Jail creators will get EEXIST 1048192895Sjamie * even though they cannot see the jail, and CREATE | UPDATE 1049192895Sjamie * will return ENOENT which is not normally a valid error. 1050192895Sjamie */ 1051191673Sjamie if (jid < 0) { 1052191673Sjamie error = EINVAL; 1053191673Sjamie vfs_opterror(opts, "negative jid"); 1054191673Sjamie goto done_unlock_list; 1055191673Sjamie } 1056191673Sjamie pr = prison_find(jid); 1057191673Sjamie if (pr != NULL) { 1058192895Sjamie ppr = pr->pr_parent; 1059191673Sjamie /* Create: jid must not exist. */ 1060191673Sjamie if (cuflags == JAIL_CREATE) { 1061191673Sjamie mtx_unlock(&pr->pr_mtx); 1062191673Sjamie error = EEXIST; 1063191673Sjamie vfs_opterror(opts, "jail %d already exists", 1064191673Sjamie jid); 1065191673Sjamie goto done_unlock_list; 1066191673Sjamie } 1067192895Sjamie if (!prison_ischild(mypr, pr)) { 1068192895Sjamie mtx_unlock(&pr->pr_mtx); 1069192895Sjamie pr = NULL; 1070192895Sjamie } else if (pr->pr_uref == 0) { 1071191673Sjamie if (!(flags & JAIL_DYING)) { 1072191673Sjamie mtx_unlock(&pr->pr_mtx); 1073191673Sjamie error = ENOENT; 1074191673Sjamie vfs_opterror(opts, "jail %d is dying", 1075191673Sjamie jid); 1076191673Sjamie goto done_unlock_list; 1077191673Sjamie } else if ((flags & JAIL_ATTACH) || 1078191673Sjamie (pr_flags & PR_PERSIST)) { 1079191673Sjamie /* 1080191673Sjamie * A dying jail might be resurrected 1081191673Sjamie * (via attach or persist), but first 1082191673Sjamie * it must determine if another jail 1083191673Sjamie * has claimed its name. Accomplish 1084191673Sjamie * this by implicitly re-setting the 1085191673Sjamie * name. 1086191673Sjamie */ 1087191673Sjamie if (name == NULL) 1088192895Sjamie name = prison_name(mypr, pr); 1089191673Sjamie } 1090191673Sjamie } 1091191673Sjamie } 1092191673Sjamie if (pr == NULL) { 1093191673Sjamie /* Update: jid must exist. */ 1094191673Sjamie if (cuflags == JAIL_UPDATE) { 1095191673Sjamie error = ENOENT; 1096191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1097191673Sjamie goto done_unlock_list; 1098191673Sjamie } 1099191673Sjamie } 1100191673Sjamie } 1101191673Sjamie /* 1102191673Sjamie * If the caller provided a name, look for a jail by that name. 1103191673Sjamie * This has different semantics for creates and updates keyed by jid 1104191673Sjamie * (where the name must not already exist in a different jail), 1105191673Sjamie * and updates keyed by the name itself (where the name must exist 1106191673Sjamie * because that is the jail being updated). 1107191673Sjamie */ 1108298833Sjamie namelc = NULL; 1109191673Sjamie if (name != NULL) { 1110196835Sjamie namelc = strrchr(name, '.'); 1111196835Sjamie if (namelc == NULL) 1112196835Sjamie namelc = name; 1113196835Sjamie else { 1114192895Sjamie /* 1115192895Sjamie * This is a hierarchical name. Split it into the 1116192895Sjamie * parent and child names, and make sure the parent 1117192895Sjamie * exists or matches an already found jail. 1118192895Sjamie */ 1119192895Sjamie if (pr != NULL) { 1120196835Sjamie if (strncmp(name, ppr->pr_name, namelc - name) 1121196835Sjamie || ppr->pr_name[namelc - name] != '\0') { 1122192895Sjamie mtx_unlock(&pr->pr_mtx); 1123192895Sjamie error = EINVAL; 1124192895Sjamie vfs_opterror(opts, 1125192895Sjamie "cannot change jail's parent"); 1126192895Sjamie goto done_unlock_list; 1127192895Sjamie } 1128192895Sjamie } else { 1129298833Sjamie *namelc = '\0'; 1130192895Sjamie ppr = prison_find_name(mypr, name); 1131192895Sjamie if (ppr == NULL) { 1132192895Sjamie error = ENOENT; 1133192895Sjamie vfs_opterror(opts, 1134192895Sjamie "jail \"%s\" not found", name); 1135192895Sjamie goto done_unlock_list; 1136192895Sjamie } 1137192895Sjamie mtx_unlock(&ppr->pr_mtx); 1138298833Sjamie *namelc = '.'; 1139192895Sjamie } 1140298833Sjamie namelc++; 1141192895Sjamie } 1142298833Sjamie if (namelc[0] != '\0') { 1143298833Sjamie pnamelen = 1144192895Sjamie (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1145192895Sjamie name_again: 1146191673Sjamie deadpr = NULL; 1147192895Sjamie FOREACH_PRISON_CHILD(ppr, tpr) { 1148191673Sjamie if (tpr != pr && tpr->pr_ref > 0 && 1149298833Sjamie !strcmp(tpr->pr_name + pnamelen, namelc)) { 1150191673Sjamie if (pr == NULL && 1151191673Sjamie cuflags != JAIL_CREATE) { 1152191673Sjamie mtx_lock(&tpr->pr_mtx); 1153191673Sjamie if (tpr->pr_ref > 0) { 1154191673Sjamie /* 1155191673Sjamie * Use this jail 1156191673Sjamie * for updates. 1157191673Sjamie */ 1158191673Sjamie if (tpr->pr_uref > 0) { 1159191673Sjamie pr = tpr; 1160191673Sjamie break; 1161191673Sjamie } 1162191673Sjamie deadpr = tpr; 1163191673Sjamie } 1164191673Sjamie mtx_unlock(&tpr->pr_mtx); 1165191673Sjamie } else if (tpr->pr_uref > 0) { 1166191673Sjamie /* 1167191673Sjamie * Create, or update(jid): 1168191673Sjamie * name must not exist in an 1169192895Sjamie * active sibling jail. 1170191673Sjamie */ 1171191673Sjamie error = EEXIST; 1172191673Sjamie if (pr != NULL) 1173191673Sjamie mtx_unlock(&pr->pr_mtx); 1174191673Sjamie vfs_opterror(opts, 1175191673Sjamie "jail \"%s\" already exists", 1176191673Sjamie name); 1177191673Sjamie goto done_unlock_list; 1178191673Sjamie } 1179191673Sjamie } 1180191673Sjamie } 1181191673Sjamie /* If no active jail is found, use a dying one. */ 1182191673Sjamie if (deadpr != NULL && pr == NULL) { 1183191673Sjamie if (flags & JAIL_DYING) { 1184191673Sjamie mtx_lock(&deadpr->pr_mtx); 1185191673Sjamie if (deadpr->pr_ref == 0) { 1186191673Sjamie mtx_unlock(&deadpr->pr_mtx); 1187191673Sjamie goto name_again; 1188191673Sjamie } 1189191673Sjamie pr = deadpr; 1190191673Sjamie } else if (cuflags == JAIL_UPDATE) { 1191191673Sjamie error = ENOENT; 1192191673Sjamie vfs_opterror(opts, 1193191673Sjamie "jail \"%s\" is dying", name); 1194191673Sjamie goto done_unlock_list; 1195191673Sjamie } 1196191673Sjamie } 1197191673Sjamie /* Update: name must exist if no jid. */ 1198191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1199191673Sjamie error = ENOENT; 1200191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1201191673Sjamie name); 1202191673Sjamie goto done_unlock_list; 1203191673Sjamie } 1204191673Sjamie } 1205191673Sjamie } 1206191673Sjamie /* Update: must provide a jid or name. */ 1207191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1208191673Sjamie error = ENOENT; 1209191673Sjamie vfs_opterror(opts, "update specified no jail"); 1210191673Sjamie goto done_unlock_list; 1211191673Sjamie } 1212185435Sbz 1213191673Sjamie /* If there's no prison to update, create a new one and link it in. */ 1214191673Sjamie if (pr == NULL) { 1215194762Sjamie for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent) 1216194762Sjamie if (tpr->pr_childcount >= tpr->pr_childmax) { 1217194762Sjamie error = EPERM; 1218194762Sjamie vfs_opterror(opts, "prison limit exceeded"); 1219194762Sjamie goto done_unlock_list; 1220194762Sjamie } 1221191673Sjamie created = 1; 1222192895Sjamie mtx_lock(&ppr->pr_mtx); 1223298832Sjamie if (ppr->pr_ref == 0) { 1224192895Sjamie mtx_unlock(&ppr->pr_mtx); 1225192895Sjamie error = ENOENT; 1226298833Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1227298833Sjamie prison_name(mypr, ppr)); 1228192895Sjamie goto done_unlock_list; 1229192895Sjamie } 1230192895Sjamie ppr->pr_ref++; 1231192895Sjamie ppr->pr_uref++; 1232192895Sjamie mtx_unlock(&ppr->pr_mtx); 1233191673Sjamie pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); 1234191673Sjamie if (jid == 0) { 1235191673Sjamie /* Find the next free jid. */ 1236191673Sjamie jid = lastprid + 1; 1237191673Sjamie findnext: 1238191673Sjamie if (jid == JAIL_MAX) 1239191673Sjamie jid = 1; 1240191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) { 1241191673Sjamie if (tpr->pr_id < jid) 1242191673Sjamie continue; 1243191673Sjamie if (tpr->pr_id > jid || tpr->pr_ref == 0) { 1244191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1245191673Sjamie break; 1246191673Sjamie } 1247191673Sjamie if (jid == lastprid) { 1248191673Sjamie error = EAGAIN; 1249191673Sjamie vfs_opterror(opts, 1250191673Sjamie "no available jail IDs"); 1251191673Sjamie free(pr, M_PRISON); 1252192895Sjamie prison_deref(ppr, PD_DEREF | 1253192895Sjamie PD_DEUREF | PD_LIST_XLOCKED); 1254192895Sjamie goto done_releroot; 1255191673Sjamie } 1256191673Sjamie jid++; 1257191673Sjamie goto findnext; 1258191673Sjamie } 1259191673Sjamie lastprid = jid; 1260191673Sjamie } else { 1261191673Sjamie /* 1262191673Sjamie * The jail already has a jid (that did not yet exist), 1263191673Sjamie * so just find where to insert it. 1264191673Sjamie */ 1265191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) 1266191673Sjamie if (tpr->pr_id >= jid) { 1267191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1268191673Sjamie break; 1269191673Sjamie } 1270191673Sjamie } 1271191673Sjamie if (tpr == NULL) 1272191673Sjamie TAILQ_INSERT_TAIL(&allprison, pr, pr_list); 1273192895Sjamie LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling); 1274192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 1275194762Sjamie tpr->pr_childcount++; 1276185435Sbz 1277192895Sjamie pr->pr_parent = ppr; 1278191673Sjamie pr->pr_id = jid; 1279192895Sjamie 1280192895Sjamie /* Set some default values, and inherit some from the parent. */ 1281298833Sjamie if (namelc == NULL) 1282298833Sjamie namelc = ""; 1283191673Sjamie if (path == NULL) { 1284191673Sjamie path = "/"; 1285192895Sjamie root = mypr->pr_root; 1286191673Sjamie vref(root); 1287191673Sjamie } 1288195944Sjamie strlcpy(pr->pr_hostuuid, DEFAULT_HOSTUUID, HOSTUUIDLEN); 1289195944Sjamie pr->pr_flags |= PR_HOST; 1290195945Sjamie#if defined(INET) || defined(INET6) 1291195945Sjamie#ifdef VIMAGE 1292195945Sjamie if (!(pr_flags & PR_VNET)) 1293195945Sjamie#endif 1294195945Sjamie { 1295192895Sjamie#ifdef INET 1296195974Sjamie if (!(ch_flags & PR_IP4_USER)) 1297195974Sjamie pr->pr_flags |= 1298195974Sjamie PR_IP4 | PR_IP4_USER | PR_IP4_DISABLE; 1299195974Sjamie else if (!(pr_flags & PR_IP4_USER)) { 1300195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP4; 1301195974Sjamie if (ppr->pr_ip4 != NULL) { 1302195974Sjamie pr->pr_ip4s = ppr->pr_ip4s; 1303195974Sjamie pr->pr_ip4 = malloc(pr->pr_ip4s * 1304195974Sjamie sizeof(struct in_addr), M_PRISON, 1305195974Sjamie M_WAITOK); 1306195974Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 1307195974Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1308195974Sjamie } 1309195974Sjamie } 1310192895Sjamie#endif 1311192895Sjamie#ifdef INET6 1312195974Sjamie if (!(ch_flags & PR_IP6_USER)) 1313195974Sjamie pr->pr_flags |= 1314195974Sjamie PR_IP6 | PR_IP6_USER | PR_IP6_DISABLE; 1315195974Sjamie else if (!(pr_flags & PR_IP6_USER)) { 1316195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP6; 1317195974Sjamie if (ppr->pr_ip6 != NULL) { 1318195974Sjamie pr->pr_ip6s = ppr->pr_ip6s; 1319195974Sjamie pr->pr_ip6 = malloc(pr->pr_ip6s * 1320195974Sjamie sizeof(struct in6_addr), M_PRISON, 1321195974Sjamie M_WAITOK); 1322195974Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 1323195974Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1324195974Sjamie } 1325195974Sjamie } 1326192895Sjamie#endif 1327195945Sjamie } 1328195945Sjamie#endif 1329202468Sbz /* Source address selection is always on by default. */ 1330202468Sbz pr->pr_flags |= _PR_IP_SADDRSEL; 1331202468Sbz 1332192895Sjamie pr->pr_securelevel = ppr->pr_securelevel; 1333192895Sjamie pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow; 1334196002Sjamie pr->pr_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 1335232059Smm pr->pr_devfs_rsnum = ppr->pr_devfs_rsnum; 1336191673Sjamie 1337280632Sian pr->pr_osreldate = osreldt ? osreldt : ppr->pr_osreldate; 1338280632Sian if (osrelstr == NULL) 1339280632Sian strcpy(pr->pr_osrelease, ppr->pr_osrelease); 1340280632Sian else 1341280632Sian strcpy(pr->pr_osrelease, osrelstr); 1342280632Sian 1343192895Sjamie LIST_INIT(&pr->pr_children); 1344192895Sjamie mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK); 1345298833Sjamie TASK_INIT(&pr->pr_task, 0, prison_complete, pr); 1346191673Sjamie 1347194251Sjamie#ifdef VIMAGE 1348194251Sjamie /* Allocate a new vnet if specified. */ 1349194251Sjamie pr->pr_vnet = (pr_flags & PR_VNET) 1350194251Sjamie ? vnet_alloc() : ppr->pr_vnet; 1351194251Sjamie#endif 1352185435Sbz /* 1353191673Sjamie * Allocate a dedicated cpuset for each jail. 1354191673Sjamie * Unlike other initial settings, this may return an erorr. 1355185435Sbz */ 1356192895Sjamie error = cpuset_create_root(ppr, &pr->pr_cpuset); 1357191673Sjamie if (error) { 1358191673Sjamie prison_deref(pr, PD_LIST_XLOCKED); 1359191673Sjamie goto done_releroot; 1360191673Sjamie } 1361185435Sbz 1362191673Sjamie mtx_lock(&pr->pr_mtx); 1363185435Sbz /* 1364191673Sjamie * New prisons do not yet have a reference, because we do not 1365298833Sjamie * want others to see the incomplete prison once the 1366191673Sjamie * allprison_lock is downgraded. 1367185435Sbz */ 1368191673Sjamie } else { 1369191673Sjamie created = 0; 1370195974Sjamie /* 1371195974Sjamie * Grab a reference for existing prisons, to ensure they 1372195974Sjamie * continue to exist for the duration of the call. 1373195974Sjamie */ 1374195974Sjamie pr->pr_ref++; 1375195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 1376195945Sjamie if ((pr->pr_flags & PR_VNET) && 1377195945Sjamie (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 1378195945Sjamie error = EINVAL; 1379195945Sjamie vfs_opterror(opts, 1380195945Sjamie "vnet jails cannot have IP address restrictions"); 1381195945Sjamie goto done_deref_locked; 1382195945Sjamie } 1383195945Sjamie#endif 1384195974Sjamie#ifdef INET 1385195974Sjamie if (PR_IP4_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1386195974Sjamie error = EINVAL; 1387195974Sjamie vfs_opterror(opts, 1388195974Sjamie "ip4 cannot be changed after creation"); 1389195974Sjamie goto done_deref_locked; 1390195974Sjamie } 1391195974Sjamie#endif 1392195974Sjamie#ifdef INET6 1393195974Sjamie if (PR_IP6_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1394195974Sjamie error = EINVAL; 1395195974Sjamie vfs_opterror(opts, 1396195974Sjamie "ip6 cannot be changed after creation"); 1397195974Sjamie goto done_deref_locked; 1398195974Sjamie } 1399195974Sjamie#endif 1400191673Sjamie } 1401185435Sbz 1402191673Sjamie /* Do final error checking before setting anything. */ 1403192895Sjamie if (gotslevel) { 1404192895Sjamie if (slevel < ppr->pr_securelevel) { 1405192895Sjamie error = EPERM; 1406192895Sjamie goto done_deref_locked; 1407192895Sjamie } 1408192895Sjamie } 1409194762Sjamie if (gotchildmax) { 1410194762Sjamie if (childmax >= ppr->pr_childmax) { 1411194762Sjamie error = EPERM; 1412194762Sjamie goto done_deref_locked; 1413194762Sjamie } 1414194762Sjamie } 1415192895Sjamie if (gotenforce) { 1416192895Sjamie if (enforce < ppr->pr_enforce_statfs) { 1417192895Sjamie error = EPERM; 1418192895Sjamie goto done_deref_locked; 1419192895Sjamie } 1420192895Sjamie } 1421231267Smm if (gotrsnum) { 1422231267Smm /* 1423231267Smm * devfs_rsnum is a uint16_t 1424231267Smm */ 1425232059Smm if (rsnum < 0 || rsnum > 65535) { 1426231267Smm error = EINVAL; 1427231267Smm goto done_deref_locked; 1428231267Smm } 1429231267Smm /* 1430232059Smm * Nested jails always inherit parent's devfs ruleset 1431231267Smm */ 1432231267Smm if (jailed(td->td_ucred)) { 1433231267Smm if (rsnum > 0 && rsnum != ppr->pr_devfs_rsnum) { 1434231267Smm error = EPERM; 1435231267Smm goto done_deref_locked; 1436232059Smm } else 1437231267Smm rsnum = ppr->pr_devfs_rsnum; 1438231267Smm } 1439231267Smm } 1440185435Sbz#ifdef INET 1441195974Sjamie if (ip4s > 0) { 1442192895Sjamie if (ppr->pr_flags & PR_IP4) { 1443195974Sjamie /* 1444195974Sjamie * Make sure the new set of IP addresses is a 1445195974Sjamie * subset of the parent's list. Don't worry 1446195974Sjamie * about the parent being unlocked, as any 1447195974Sjamie * setting is done with allprison_lock held. 1448195974Sjamie */ 1449195974Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 1450195974Sjamie if (ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 1451195974Sjamie break; 1452195974Sjamie if (ij == ppr->pr_ip4s) { 1453195974Sjamie error = EPERM; 1454195974Sjamie goto done_deref_locked; 1455195974Sjamie } 1456195974Sjamie if (ip4s > 1) { 1457195974Sjamie for (ii = ij = 1; ii < ip4s; ii++) { 1458195974Sjamie if (ip4[ii].s_addr == 1459195974Sjamie ppr->pr_ip4[0].s_addr) 1460195974Sjamie continue; 1461195974Sjamie for (; ij < ppr->pr_ip4s; ij++) 1462195974Sjamie if (ip4[ii].s_addr == 1463195974Sjamie ppr->pr_ip4[ij].s_addr) 1464195974Sjamie break; 1465195974Sjamie if (ij == ppr->pr_ip4s) 1466195974Sjamie break; 1467192895Sjamie } 1468192895Sjamie if (ij == ppr->pr_ip4s) { 1469192895Sjamie error = EPERM; 1470192895Sjamie goto done_deref_locked; 1471192895Sjamie } 1472192895Sjamie } 1473192895Sjamie } 1474195974Sjamie /* 1475195974Sjamie * Check for conflicting IP addresses. We permit them 1476195974Sjamie * if there is no more than one IP on each jail. If 1477195974Sjamie * there is a duplicate on a jail with more than one 1478195974Sjamie * IP stop checking and return error. 1479195974Sjamie */ 1480195974Sjamie tppr = ppr; 1481195945Sjamie#ifdef VIMAGE 1482195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1483195974Sjamie if (tppr->pr_flags & PR_VNET) 1484195974Sjamie break; 1485195945Sjamie#endif 1486195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1487195974Sjamie if (tpr == pr || 1488195945Sjamie#ifdef VIMAGE 1489195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1490195945Sjamie#endif 1491195974Sjamie tpr->pr_uref == 0) { 1492192895Sjamie descend = 0; 1493195974Sjamie continue; 1494195974Sjamie } 1495195974Sjamie if (!(tpr->pr_flags & PR_IP4_USER)) 1496195974Sjamie continue; 1497195974Sjamie descend = 0; 1498195974Sjamie if (tpr->pr_ip4 == NULL || 1499195974Sjamie (ip4s == 1 && tpr->pr_ip4s == 1)) 1500195974Sjamie continue; 1501195974Sjamie for (ii = 0; ii < ip4s; ii++) { 1502195974Sjamie if (_prison_check_ip4(tpr, &ip4[ii]) == 0) { 1503195974Sjamie error = EADDRINUSE; 1504195974Sjamie vfs_opterror(opts, 1505195974Sjamie "IPv4 addresses clash"); 1506195974Sjamie goto done_deref_locked; 1507192895Sjamie } 1508192895Sjamie } 1509192895Sjamie } 1510192895Sjamie } 1511185435Sbz#endif 1512191673Sjamie#ifdef INET6 1513195974Sjamie if (ip6s > 0) { 1514192895Sjamie if (ppr->pr_flags & PR_IP6) { 1515195974Sjamie /* 1516195974Sjamie * Make sure the new set of IP addresses is a 1517195974Sjamie * subset of the parent's list. 1518195974Sjamie */ 1519195974Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 1520195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[0], 1521195974Sjamie &ppr->pr_ip6[ij])) 1522195974Sjamie break; 1523195974Sjamie if (ij == ppr->pr_ip6s) { 1524195974Sjamie error = EPERM; 1525195974Sjamie goto done_deref_locked; 1526195974Sjamie } 1527195974Sjamie if (ip6s > 1) { 1528195974Sjamie for (ii = ij = 1; ii < ip6s; ii++) { 1529195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[ii], 1530195974Sjamie &ppr->pr_ip6[0])) 1531195974Sjamie continue; 1532195974Sjamie for (; ij < ppr->pr_ip6s; ij++) 1533195974Sjamie if (IN6_ARE_ADDR_EQUAL( 1534195974Sjamie &ip6[ii], &ppr->pr_ip6[ij])) 1535195974Sjamie break; 1536195974Sjamie if (ij == ppr->pr_ip6s) 1537195974Sjamie break; 1538192895Sjamie } 1539192895Sjamie if (ij == ppr->pr_ip6s) { 1540192895Sjamie error = EPERM; 1541192895Sjamie goto done_deref_locked; 1542192895Sjamie } 1543192895Sjamie } 1544192895Sjamie } 1545195974Sjamie /* Check for conflicting IP addresses. */ 1546195974Sjamie tppr = ppr; 1547195945Sjamie#ifdef VIMAGE 1548195974Sjamie for (; tppr != &prison0; tppr = tppr->pr_parent) 1549195974Sjamie if (tppr->pr_flags & PR_VNET) 1550195974Sjamie break; 1551195945Sjamie#endif 1552195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1553195974Sjamie if (tpr == pr || 1554195945Sjamie#ifdef VIMAGE 1555195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1556195945Sjamie#endif 1557195974Sjamie tpr->pr_uref == 0) { 1558192895Sjamie descend = 0; 1559195974Sjamie continue; 1560195974Sjamie } 1561195974Sjamie if (!(tpr->pr_flags & PR_IP6_USER)) 1562195974Sjamie continue; 1563195974Sjamie descend = 0; 1564195974Sjamie if (tpr->pr_ip6 == NULL || 1565195974Sjamie (ip6s == 1 && tpr->pr_ip6s == 1)) 1566195974Sjamie continue; 1567195974Sjamie for (ii = 0; ii < ip6s; ii++) { 1568195974Sjamie if (_prison_check_ip6(tpr, &ip6[ii]) == 0) { 1569195974Sjamie error = EADDRINUSE; 1570195974Sjamie vfs_opterror(opts, 1571195974Sjamie "IPv6 addresses clash"); 1572195974Sjamie goto done_deref_locked; 1573192895Sjamie } 1574192895Sjamie } 1575191673Sjamie } 1576192895Sjamie } 1577191673Sjamie#endif 1578192895Sjamie onamelen = namelen = 0; 1579298833Sjamie if (namelc != NULL) { 1580292416Sjamie /* Give a default name of the jid. Also allow the name to be 1581292416Sjamie * explicitly the jid - but not any other number, and only in 1582292416Sjamie * normal form (no leading zero/etc). 1583292416Sjamie */ 1584298833Sjamie if (namelc[0] == '\0') 1585298833Sjamie snprintf(namelc = numbuf, sizeof(numbuf), "%d", jid); 1586292416Sjamie else if ((strtoul(namelc, &p, 10) != jid || 1587292416Sjamie namelc[0] < '1' || namelc[0] > '9') && *p == '\0') { 1588191673Sjamie error = EINVAL; 1589196835Sjamie vfs_opterror(opts, 1590196835Sjamie "name cannot be numeric (unless it is the jid)"); 1591192895Sjamie goto done_deref_locked; 1592191673Sjamie } 1593191673Sjamie /* 1594192895Sjamie * Make sure the name isn't too long for the prison or its 1595192895Sjamie * children. 1596191673Sjamie */ 1597298833Sjamie pnamelen = (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1598298833Sjamie onamelen = strlen(pr->pr_name + pnamelen); 1599298833Sjamie namelen = strlen(namelc); 1600298833Sjamie if (pnamelen + namelen + 1 > sizeof(pr->pr_name)) { 1601192895Sjamie error = ENAMETOOLONG; 1602192895Sjamie goto done_deref_locked; 1603192895Sjamie } 1604192895Sjamie FOREACH_PRISON_DESCENDANT(pr, tpr, descend) { 1605192895Sjamie if (strlen(tpr->pr_name) + (namelen - onamelen) >= 1606192895Sjamie sizeof(pr->pr_name)) { 1607192895Sjamie error = ENAMETOOLONG; 1608192895Sjamie goto done_deref_locked; 1609192895Sjamie } 1610192895Sjamie } 1611191673Sjamie } 1612192895Sjamie if (pr_allow & ~ppr->pr_allow) { 1613192895Sjamie error = EPERM; 1614192895Sjamie goto done_deref_locked; 1615192895Sjamie } 1616185435Sbz 1617298833Sjamie /* 1618298833Sjamie * Let modules check their parameters. This requires unlocking and 1619298833Sjamie * then re-locking the prison, but this is still a valid state as long 1620298833Sjamie * as allprison_lock remains xlocked. 1621298833Sjamie */ 1622298833Sjamie mtx_unlock(&pr->pr_mtx); 1623298833Sjamie error = osd_jail_call(pr, PR_METHOD_CHECK, opts); 1624298833Sjamie if (error != 0) { 1625298833Sjamie prison_deref(pr, created 1626298833Sjamie ? PD_LIST_XLOCKED 1627298833Sjamie : PD_DEREF | PD_LIST_XLOCKED); 1628298833Sjamie goto done_releroot; 1629298833Sjamie } 1630298833Sjamie mtx_lock(&pr->pr_mtx); 1631298833Sjamie 1632298833Sjamie /* At this point, all valid parameters should have been noted. */ 1633298833Sjamie TAILQ_FOREACH(opt, opts, link) { 1634298833Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 1635298833Sjamie error = EINVAL; 1636298833Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 1637298833Sjamie goto done_deref_locked; 1638298833Sjamie } 1639298833Sjamie } 1640298833Sjamie 1641191673Sjamie /* Set the parameters of the prison. */ 1642191673Sjamie#ifdef INET 1643192895Sjamie redo_ip4 = 0; 1644195974Sjamie if (pr_flags & PR_IP4_USER) { 1645195974Sjamie pr->pr_flags |= PR_IP4; 1646195974Sjamie free(pr->pr_ip4, M_PRISON); 1647195974Sjamie pr->pr_ip4s = ip4s; 1648195974Sjamie pr->pr_ip4 = ip4; 1649195974Sjamie ip4 = NULL; 1650192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1651195945Sjamie#ifdef VIMAGE 1652195945Sjamie if (tpr->pr_flags & PR_VNET) { 1653195945Sjamie descend = 0; 1654195945Sjamie continue; 1655195945Sjamie } 1656195945Sjamie#endif 1657192895Sjamie if (prison_restrict_ip4(tpr, NULL)) { 1658192895Sjamie redo_ip4 = 1; 1659192895Sjamie descend = 0; 1660192895Sjamie } 1661192895Sjamie } 1662185435Sbz } 1663191673Sjamie#endif 1664191673Sjamie#ifdef INET6 1665192895Sjamie redo_ip6 = 0; 1666195974Sjamie if (pr_flags & PR_IP6_USER) { 1667195974Sjamie pr->pr_flags |= PR_IP6; 1668195974Sjamie free(pr->pr_ip6, M_PRISON); 1669195974Sjamie pr->pr_ip6s = ip6s; 1670195974Sjamie pr->pr_ip6 = ip6; 1671195974Sjamie ip6 = NULL; 1672192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1673195945Sjamie#ifdef VIMAGE 1674195945Sjamie if (tpr->pr_flags & PR_VNET) { 1675195945Sjamie descend = 0; 1676195945Sjamie continue; 1677195945Sjamie } 1678195945Sjamie#endif 1679192895Sjamie if (prison_restrict_ip6(tpr, NULL)) { 1680192895Sjamie redo_ip6 = 1; 1681192895Sjamie descend = 0; 1682192895Sjamie } 1683192895Sjamie } 1684191673Sjamie } 1685191673Sjamie#endif 1686192895Sjamie if (gotslevel) { 1687191673Sjamie pr->pr_securelevel = slevel; 1688192895Sjamie /* Set all child jails to be at least this level. */ 1689192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1690192895Sjamie if (tpr->pr_securelevel < slevel) 1691192895Sjamie tpr->pr_securelevel = slevel; 1692192895Sjamie } 1693194762Sjamie if (gotchildmax) { 1694194762Sjamie pr->pr_childmax = childmax; 1695194762Sjamie /* Set all child jails to under this limit. */ 1696194762Sjamie FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level) 1697194762Sjamie if (tpr->pr_childmax > childmax - level) 1698194762Sjamie tpr->pr_childmax = childmax > level 1699194762Sjamie ? childmax - level : 0; 1700194762Sjamie } 1701192895Sjamie if (gotenforce) { 1702192895Sjamie pr->pr_enforce_statfs = enforce; 1703192895Sjamie /* Pass this restriction on to the children. */ 1704192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1705192895Sjamie if (tpr->pr_enforce_statfs < enforce) 1706192895Sjamie tpr->pr_enforce_statfs = enforce; 1707192895Sjamie } 1708231267Smm if (gotrsnum) { 1709231267Smm pr->pr_devfs_rsnum = rsnum; 1710231267Smm /* Pass this restriction on to the children. */ 1711231267Smm FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1712232059Smm tpr->pr_devfs_rsnum = rsnum; 1713231267Smm } 1714298833Sjamie if (namelc != NULL) { 1715192895Sjamie if (ppr == &prison0) 1716298833Sjamie strlcpy(pr->pr_name, namelc, sizeof(pr->pr_name)); 1717192895Sjamie else 1718192895Sjamie snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s", 1719298833Sjamie ppr->pr_name, namelc); 1720192895Sjamie /* Change this component of child names. */ 1721192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1722192895Sjamie bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen, 1723192895Sjamie strlen(tpr->pr_name + onamelen) + 1); 1724192895Sjamie bcopy(pr->pr_name, tpr->pr_name, namelen); 1725192895Sjamie } 1726192895Sjamie } 1727191673Sjamie if (path != NULL) { 1728192895Sjamie /* Try to keep a real-rooted full pathname. */ 1729230129Smm if (fullpath_disabled && path[0] == '/' && 1730230129Smm strcmp(mypr->pr_path, "/")) 1731192895Sjamie snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s", 1732192895Sjamie mypr->pr_path, path); 1733192895Sjamie else 1734192895Sjamie strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); 1735191673Sjamie pr->pr_root = root; 1736191673Sjamie } 1737193066Sjamie if (PR_HOST & ch_flags & ~pr_flags) { 1738193066Sjamie if (pr->pr_flags & PR_HOST) { 1739193066Sjamie /* 1740193066Sjamie * Copy the parent's host info. As with pr_ip4 above, 1741193066Sjamie * the lack of a lock on the parent is not a problem; 1742193066Sjamie * it is always set with allprison_lock at least 1743193066Sjamie * shared, and is held exclusively here. 1744193066Sjamie */ 1745194118Sjamie strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname, 1746194118Sjamie sizeof(pr->pr_hostname)); 1747194118Sjamie strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname, 1748194118Sjamie sizeof(pr->pr_domainname)); 1749194118Sjamie strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid, 1750194118Sjamie sizeof(pr->pr_hostuuid)); 1751193066Sjamie pr->pr_hostid = pr->pr_parent->pr_hostid; 1752193066Sjamie } 1753193066Sjamie } else if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1754193066Sjamie /* Set this prison, and any descendants without PR_HOST. */ 1755193066Sjamie if (host != NULL) 1756194118Sjamie strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname)); 1757193066Sjamie if (domain != NULL) 1758194118Sjamie strlcpy(pr->pr_domainname, domain, 1759194118Sjamie sizeof(pr->pr_domainname)); 1760193066Sjamie if (uuid != NULL) 1761194118Sjamie strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid)); 1762193066Sjamie if (gothid) 1763193066Sjamie pr->pr_hostid = hid; 1764193066Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1765193066Sjamie if (tpr->pr_flags & PR_HOST) 1766193066Sjamie descend = 0; 1767193066Sjamie else { 1768193066Sjamie if (host != NULL) 1769194118Sjamie strlcpy(tpr->pr_hostname, 1770194118Sjamie pr->pr_hostname, 1771194118Sjamie sizeof(tpr->pr_hostname)); 1772193066Sjamie if (domain != NULL) 1773194118Sjamie strlcpy(tpr->pr_domainname, 1774194118Sjamie pr->pr_domainname, 1775194118Sjamie sizeof(tpr->pr_domainname)); 1776193066Sjamie if (uuid != NULL) 1777194118Sjamie strlcpy(tpr->pr_hostuuid, 1778194118Sjamie pr->pr_hostuuid, 1779194118Sjamie sizeof(tpr->pr_hostuuid)); 1780193066Sjamie if (gothid) 1781193066Sjamie tpr->pr_hostid = hid; 1782193066Sjamie } 1783193066Sjamie } 1784193066Sjamie } 1785192895Sjamie if ((tallow = ch_allow & ~pr_allow)) { 1786192895Sjamie /* Clear allow bits in all children. */ 1787192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1788192895Sjamie tpr->pr_allow &= ~tallow; 1789192895Sjamie } 1790192895Sjamie pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow; 1791191673Sjamie /* 1792191673Sjamie * Persistent prisons get an extra reference, and prisons losing their 1793191673Sjamie * persist flag lose that reference. Only do this for existing prisons 1794191673Sjamie * for now, so new ones will remain unseen until after the module 1795191673Sjamie * handlers have completed. 1796191673Sjamie */ 1797298833Sjamie born = pr->pr_uref == 0; 1798191673Sjamie if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { 1799191673Sjamie if (pr_flags & PR_PERSIST) { 1800191673Sjamie pr->pr_ref++; 1801191673Sjamie pr->pr_uref++; 1802191673Sjamie } else { 1803191673Sjamie pr->pr_ref--; 1804191673Sjamie pr->pr_uref--; 1805191673Sjamie } 1806191673Sjamie } 1807191673Sjamie pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; 1808191673Sjamie mtx_unlock(&pr->pr_mtx); 1809185435Sbz 1810221362Strasz#ifdef RACCT 1811284665Strasz if (racct_enable && created) 1812221362Strasz prison_racct_attach(pr); 1813221362Strasz#endif 1814221362Strasz 1815192895Sjamie /* Locks may have prevented a complete restriction of child IP 1816192895Sjamie * addresses. If so, allocate some more memory and try again. 1817192895Sjamie */ 1818192895Sjamie#ifdef INET 1819192895Sjamie while (redo_ip4) { 1820192895Sjamie ip4s = pr->pr_ip4s; 1821192895Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 1822192895Sjamie mtx_lock(&pr->pr_mtx); 1823192895Sjamie redo_ip4 = 0; 1824192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1825195945Sjamie#ifdef VIMAGE 1826195945Sjamie if (tpr->pr_flags & PR_VNET) { 1827195945Sjamie descend = 0; 1828195945Sjamie continue; 1829195945Sjamie } 1830195945Sjamie#endif 1831192895Sjamie if (prison_restrict_ip4(tpr, ip4)) { 1832192895Sjamie if (ip4 != NULL) 1833192895Sjamie ip4 = NULL; 1834192895Sjamie else 1835192895Sjamie redo_ip4 = 1; 1836192895Sjamie } 1837192895Sjamie } 1838192895Sjamie mtx_unlock(&pr->pr_mtx); 1839192895Sjamie } 1840192895Sjamie#endif 1841192895Sjamie#ifdef INET6 1842192895Sjamie while (redo_ip6) { 1843192895Sjamie ip6s = pr->pr_ip6s; 1844192895Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 1845192895Sjamie mtx_lock(&pr->pr_mtx); 1846192895Sjamie redo_ip6 = 0; 1847192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1848195945Sjamie#ifdef VIMAGE 1849195945Sjamie if (tpr->pr_flags & PR_VNET) { 1850195945Sjamie descend = 0; 1851195945Sjamie continue; 1852195945Sjamie } 1853195945Sjamie#endif 1854192895Sjamie if (prison_restrict_ip6(tpr, ip6)) { 1855192895Sjamie if (ip6 != NULL) 1856192895Sjamie ip6 = NULL; 1857192895Sjamie else 1858192895Sjamie redo_ip6 = 1; 1859192895Sjamie } 1860192895Sjamie } 1861192895Sjamie mtx_unlock(&pr->pr_mtx); 1862192895Sjamie } 1863192895Sjamie#endif 1864192895Sjamie 1865191673Sjamie /* Let the modules do their work. */ 1866191673Sjamie sx_downgrade(&allprison_lock); 1867298833Sjamie if (born) { 1868191673Sjamie error = osd_jail_call(pr, PR_METHOD_CREATE, opts); 1869191673Sjamie if (error) { 1870298833Sjamie (void)osd_jail_call(pr, PR_METHOD_REMOVE, NULL); 1871298833Sjamie prison_deref(pr, created 1872298833Sjamie ? PD_LIST_SLOCKED 1873298833Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1874191673Sjamie goto done_errmsg; 1875191673Sjamie } 1876191673Sjamie } 1877191673Sjamie error = osd_jail_call(pr, PR_METHOD_SET, opts); 1878191673Sjamie if (error) { 1879298833Sjamie if (born) 1880298833Sjamie (void)osd_jail_call(pr, PR_METHOD_REMOVE, NULL); 1881191673Sjamie prison_deref(pr, created 1882191673Sjamie ? PD_LIST_SLOCKED 1883191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1884191673Sjamie goto done_errmsg; 1885191673Sjamie } 1886191673Sjamie 1887191673Sjamie /* Attach this process to the prison if requested. */ 1888191673Sjamie if (flags & JAIL_ATTACH) { 1889191673Sjamie mtx_lock(&pr->pr_mtx); 1890191673Sjamie error = do_jail_attach(td, pr); 1891191673Sjamie if (error) { 1892191673Sjamie vfs_opterror(opts, "attach failed"); 1893191673Sjamie if (!created) 1894191673Sjamie prison_deref(pr, PD_DEREF); 1895191673Sjamie goto done_errmsg; 1896191673Sjamie } 1897191673Sjamie } 1898191673Sjamie 1899235803Strasz#ifdef RACCT 1900284665Strasz if (racct_enable && !created) { 1901271622Strasz if (!(flags & JAIL_ATTACH)) 1902271622Strasz sx_sunlock(&allprison_lock); 1903235803Strasz prison_racct_modify(pr); 1904271622Strasz if (!(flags & JAIL_ATTACH)) 1905271622Strasz sx_slock(&allprison_lock); 1906235803Strasz } 1907235803Strasz#endif 1908235803Strasz 1909235803Strasz td->td_retval[0] = pr->pr_id; 1910235803Strasz 1911191673Sjamie /* 1912191673Sjamie * Now that it is all there, drop the temporary reference from existing 1913191673Sjamie * prisons. Or add a reference to newly created persistent prisons 1914191673Sjamie * (which was not done earlier so that the prison would not be publicly 1915191673Sjamie * visible). 1916191673Sjamie */ 1917191673Sjamie if (!created) { 1918191673Sjamie prison_deref(pr, (flags & JAIL_ATTACH) 1919191673Sjamie ? PD_DEREF 1920191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1921191673Sjamie } else { 1922191673Sjamie if (pr_flags & PR_PERSIST) { 1923191673Sjamie mtx_lock(&pr->pr_mtx); 1924191673Sjamie pr->pr_ref++; 1925191673Sjamie pr->pr_uref++; 1926191673Sjamie mtx_unlock(&pr->pr_mtx); 1927191673Sjamie } 1928191673Sjamie if (!(flags & JAIL_ATTACH)) 1929191673Sjamie sx_sunlock(&allprison_lock); 1930191673Sjamie } 1931232598Strasz 1932298833Sjamie goto done_free; 1933191673Sjamie 1934192895Sjamie done_deref_locked: 1935192895Sjamie prison_deref(pr, created 1936192895Sjamie ? PD_LOCKED | PD_LIST_XLOCKED 1937192895Sjamie : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 1938192895Sjamie goto done_releroot; 1939191673Sjamie done_unlock_list: 1940191673Sjamie sx_xunlock(&allprison_lock); 1941191673Sjamie done_releroot: 1942241896Skib if (root != NULL) 1943191673Sjamie vrele(root); 1944191673Sjamie done_errmsg: 1945191673Sjamie if (error) { 1946191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 1947191673Sjamie if (errmsg_len > 0) { 1948191673Sjamie errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; 1949191673Sjamie if (errmsg_pos > 0) { 1950191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 1951191673Sjamie bcopy(errmsg, 1952191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1953191673Sjamie errmsg_len); 1954191673Sjamie else 1955191673Sjamie copyout(errmsg, 1956191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1957191673Sjamie errmsg_len); 1958191673Sjamie } 1959191673Sjamie } 1960191673Sjamie } 1961191673Sjamie done_free: 1962191673Sjamie#ifdef INET 1963191673Sjamie free(ip4, M_PRISON); 1964191673Sjamie#endif 1965191673Sjamie#ifdef INET6 1966191673Sjamie free(ip6, M_PRISON); 1967191673Sjamie#endif 1968230407Smm if (g_path != NULL) 1969230407Smm free(g_path, M_TEMP); 1970191673Sjamie vfs_freeopts(opts); 1971191673Sjamie return (error); 1972191673Sjamie} 1973191673Sjamie 1974191673Sjamie 197582710Sdillon/* 1976191673Sjamie * struct jail_get_args { 1977191673Sjamie * struct iovec *iovp; 1978191673Sjamie * unsigned int iovcnt; 1979191673Sjamie * int flags; 1980114168Smike * }; 198182710Sdillon */ 198246155Sphkint 1983225617Skmacysys_jail_get(struct thread *td, struct jail_get_args *uap) 198446155Sphk{ 1985191673Sjamie struct uio *auio; 1986185435Sbz int error; 1987185435Sbz 1988191673Sjamie /* Check that we have an even number of iovecs. */ 1989191673Sjamie if (uap->iovcnt & 1) 1990191673Sjamie return (EINVAL); 1991191673Sjamie 1992191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 1993185435Sbz if (error) 1994185435Sbz return (error); 1995191673Sjamie error = kern_jail_get(td, auio, uap->flags); 1996191673Sjamie if (error == 0) 1997191673Sjamie error = copyout(auio->uio_iov, uap->iovp, 1998191673Sjamie uap->iovcnt * sizeof (struct iovec)); 1999191673Sjamie free(auio, M_IOV); 2000191673Sjamie return (error); 2001191673Sjamie} 2002185435Sbz 2003191673Sjamieint 2004191673Sjamiekern_jail_get(struct thread *td, struct uio *optuio, int flags) 2005191673Sjamie{ 2006192895Sjamie struct prison *pr, *mypr; 2007191673Sjamie struct vfsopt *opt; 2008191673Sjamie struct vfsoptlist *opts; 2009191673Sjamie char *errmsg, *name; 2010192895Sjamie int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos; 2011185435Sbz 2012191673Sjamie if (flags & ~JAIL_GET_MASK) 2013191673Sjamie return (EINVAL); 2014185435Sbz 2015191673Sjamie /* Get the parameter list. */ 2016191673Sjamie error = vfs_buildopts(optuio, &opts); 2017191673Sjamie if (error) 2018191673Sjamie return (error); 2019191673Sjamie errmsg_pos = vfs_getopt_pos(opts, "errmsg"); 2020192895Sjamie mypr = td->td_ucred->cr_prison; 2021185435Sbz 2022191673Sjamie /* 2023191673Sjamie * Find the prison specified by one of: lastjid, jid, name. 2024191673Sjamie */ 2025191673Sjamie sx_slock(&allprison_lock); 2026191673Sjamie error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); 2027191673Sjamie if (error == 0) { 2028191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2029192895Sjamie if (pr->pr_id > jid && prison_ischild(mypr, pr)) { 2030191673Sjamie mtx_lock(&pr->pr_mtx); 2031191673Sjamie if (pr->pr_ref > 0 && 2032191673Sjamie (pr->pr_uref > 0 || (flags & JAIL_DYING))) 2033191673Sjamie break; 2034191673Sjamie mtx_unlock(&pr->pr_mtx); 2035191673Sjamie } 2036191673Sjamie } 2037191673Sjamie if (pr != NULL) 2038191673Sjamie goto found_prison; 2039191673Sjamie error = ENOENT; 2040191673Sjamie vfs_opterror(opts, "no jail after %d", jid); 2041191673Sjamie goto done_unlock_list; 2042191673Sjamie } else if (error != ENOENT) 2043191673Sjamie goto done_unlock_list; 2044185435Sbz 2045191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 2046191673Sjamie if (error == 0) { 2047191673Sjamie if (jid != 0) { 2048192895Sjamie pr = prison_find_child(mypr, jid); 2049191673Sjamie if (pr != NULL) { 2050191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 2051191673Sjamie mtx_unlock(&pr->pr_mtx); 2052191673Sjamie error = ENOENT; 2053191673Sjamie vfs_opterror(opts, "jail %d is dying", 2054191673Sjamie jid); 2055191673Sjamie goto done_unlock_list; 2056191673Sjamie } 2057191673Sjamie goto found_prison; 2058191673Sjamie } 2059191673Sjamie error = ENOENT; 2060191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 2061191673Sjamie goto done_unlock_list; 2062191673Sjamie } 2063191673Sjamie } else if (error != ENOENT) 2064191673Sjamie goto done_unlock_list; 206546155Sphk 2066191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 2067191673Sjamie if (error == 0) { 2068191673Sjamie if (len == 0 || name[len - 1] != '\0') { 2069191673Sjamie error = EINVAL; 2070191673Sjamie goto done_unlock_list; 2071191673Sjamie } 2072192895Sjamie pr = prison_find_name(mypr, name); 2073191673Sjamie if (pr != NULL) { 2074191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 2075191673Sjamie mtx_unlock(&pr->pr_mtx); 2076191673Sjamie error = ENOENT; 2077191673Sjamie vfs_opterror(opts, "jail \"%s\" is dying", 2078191673Sjamie name); 2079191673Sjamie goto done_unlock_list; 2080191673Sjamie } 2081191673Sjamie goto found_prison; 2082191673Sjamie } 2083191673Sjamie error = ENOENT; 2084191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", name); 2085191673Sjamie goto done_unlock_list; 2086191673Sjamie } else if (error != ENOENT) 2087191673Sjamie goto done_unlock_list; 2088185435Sbz 2089191673Sjamie vfs_opterror(opts, "no jail specified"); 2090191673Sjamie error = ENOENT; 2091191673Sjamie goto done_unlock_list; 2092191673Sjamie 2093191673Sjamie found_prison: 2094191673Sjamie /* Get the parameters of the prison. */ 2095191673Sjamie pr->pr_ref++; 2096191673Sjamie locked = PD_LOCKED; 2097191673Sjamie td->td_retval[0] = pr->pr_id; 2098191673Sjamie error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); 2099191673Sjamie if (error != 0 && error != ENOENT) 2100191673Sjamie goto done_deref; 2101192895Sjamie i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id; 2102192895Sjamie error = vfs_setopt(opts, "parent", &i, sizeof(i)); 2103191673Sjamie if (error != 0 && error != ENOENT) 2104191673Sjamie goto done_deref; 2105192895Sjamie error = vfs_setopts(opts, "name", prison_name(mypr, pr)); 2106192895Sjamie if (error != 0 && error != ENOENT) 2107192895Sjamie goto done_deref; 2108192895Sjamie error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id, 2109191673Sjamie sizeof(pr->pr_cpuset->cs_id)); 2110191673Sjamie if (error != 0 && error != ENOENT) 2111191673Sjamie goto done_deref; 2112192895Sjamie error = vfs_setopts(opts, "path", prison_path(mypr, pr)); 2113191673Sjamie if (error != 0 && error != ENOENT) 2114191673Sjamie goto done_deref; 2115191673Sjamie#ifdef INET 2116191673Sjamie error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, 2117191673Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2118191673Sjamie if (error != 0 && error != ENOENT) 2119191673Sjamie goto done_deref; 2120191673Sjamie#endif 2121191673Sjamie#ifdef INET6 2122191673Sjamie error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, 2123191673Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 2124191673Sjamie if (error != 0 && error != ENOENT) 2125191673Sjamie goto done_deref; 2126191673Sjamie#endif 2127191673Sjamie error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, 2128191673Sjamie sizeof(pr->pr_securelevel)); 2129191673Sjamie if (error != 0 && error != ENOENT) 2130191673Sjamie goto done_deref; 2131194762Sjamie error = vfs_setopt(opts, "children.cur", &pr->pr_childcount, 2132194762Sjamie sizeof(pr->pr_childcount)); 2133194762Sjamie if (error != 0 && error != ENOENT) 2134194762Sjamie goto done_deref; 2135194762Sjamie error = vfs_setopt(opts, "children.max", &pr->pr_childmax, 2136194762Sjamie sizeof(pr->pr_childmax)); 2137194762Sjamie if (error != 0 && error != ENOENT) 2138194762Sjamie goto done_deref; 2139194118Sjamie error = vfs_setopts(opts, "host.hostname", pr->pr_hostname); 2140191673Sjamie if (error != 0 && error != ENOENT) 2141191673Sjamie goto done_deref; 2142194118Sjamie error = vfs_setopts(opts, "host.domainname", pr->pr_domainname); 2143193066Sjamie if (error != 0 && error != ENOENT) 2144193066Sjamie goto done_deref; 2145194118Sjamie error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid); 2146193066Sjamie if (error != 0 && error != ENOENT) 2147193066Sjamie goto done_deref; 2148205014Snwhitehorn#ifdef COMPAT_FREEBSD32 2149217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 2150193066Sjamie uint32_t hid32 = pr->pr_hostid; 2151193066Sjamie 2152193066Sjamie error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32)); 2153193066Sjamie } else 2154193066Sjamie#endif 2155193066Sjamie error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid, 2156193066Sjamie sizeof(pr->pr_hostid)); 2157193066Sjamie if (error != 0 && error != ENOENT) 2158193066Sjamie goto done_deref; 2159192895Sjamie error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs, 2160192895Sjamie sizeof(pr->pr_enforce_statfs)); 2161191673Sjamie if (error != 0 && error != ENOENT) 2162191673Sjamie goto done_deref; 2163231267Smm error = vfs_setopt(opts, "devfs_ruleset", &pr->pr_devfs_rsnum, 2164231267Smm sizeof(pr->pr_devfs_rsnum)); 2165231267Smm if (error != 0 && error != ENOENT) 2166231267Smm goto done_deref; 2167192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 2168192895Sjamie fi++) { 2169192895Sjamie if (pr_flag_names[fi] == NULL) 2170192895Sjamie continue; 2171192895Sjamie i = (pr->pr_flags & (1 << fi)) ? 1 : 0; 2172192895Sjamie error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i)); 2173192895Sjamie if (error != 0 && error != ENOENT) 2174192895Sjamie goto done_deref; 2175192895Sjamie i = !i; 2176192895Sjamie error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i)); 2177192895Sjamie if (error != 0 && error != ENOENT) 2178192895Sjamie goto done_deref; 2179192895Sjamie } 2180195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 2181195870Sjamie fi++) { 2182195870Sjamie i = pr->pr_flags & 2183195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 2184195870Sjamie i = pr_flag_jailsys[fi].disable && 2185195870Sjamie (i == pr_flag_jailsys[fi].disable) ? JAIL_SYS_DISABLE 2186195870Sjamie : (i == pr_flag_jailsys[fi].new) ? JAIL_SYS_NEW 2187195870Sjamie : JAIL_SYS_INHERIT; 2188195870Sjamie error = 2189195870Sjamie vfs_setopt(opts, pr_flag_jailsys[fi].name, &i, sizeof(i)); 2190195870Sjamie if (error != 0 && error != ENOENT) 2191195870Sjamie goto done_deref; 2192195870Sjamie } 2193192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 2194192895Sjamie fi++) { 2195192895Sjamie if (pr_allow_names[fi] == NULL) 2196192895Sjamie continue; 2197192895Sjamie i = (pr->pr_allow & (1 << fi)) ? 1 : 0; 2198192895Sjamie error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i)); 2199192895Sjamie if (error != 0 && error != ENOENT) 2200192895Sjamie goto done_deref; 2201192895Sjamie i = !i; 2202192895Sjamie error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i)); 2203192895Sjamie if (error != 0 && error != ENOENT) 2204192895Sjamie goto done_deref; 2205192895Sjamie } 2206191673Sjamie i = (pr->pr_uref == 0); 2207191673Sjamie error = vfs_setopt(opts, "dying", &i, sizeof(i)); 2208191673Sjamie if (error != 0 && error != ENOENT) 2209191673Sjamie goto done_deref; 2210191673Sjamie i = !i; 2211191673Sjamie error = vfs_setopt(opts, "nodying", &i, sizeof(i)); 2212191673Sjamie if (error != 0 && error != ENOENT) 2213191673Sjamie goto done_deref; 2214280632Sian error = vfs_setopt(opts, "osreldate", &pr->pr_osreldate, 2215280632Sian sizeof(pr->pr_osreldate)); 2216280632Sian if (error != 0 && error != ENOENT) 2217280632Sian goto done_deref; 2218280632Sian error = vfs_setopts(opts, "osrelease", pr->pr_osrelease); 2219280632Sian if (error != 0 && error != ENOENT) 2220280632Sian goto done_deref; 2221191673Sjamie 2222191673Sjamie /* Get the module parameters. */ 2223191673Sjamie mtx_unlock(&pr->pr_mtx); 2224191673Sjamie locked = 0; 2225191673Sjamie error = osd_jail_call(pr, PR_METHOD_GET, opts); 222646155Sphk if (error) 2227191673Sjamie goto done_deref; 2228191673Sjamie prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); 222984828Sjhb 2230191673Sjamie /* By now, all parameters should have been noted. */ 2231191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2232191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 2233191673Sjamie error = EINVAL; 2234191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 2235191673Sjamie goto done_errmsg; 2236191673Sjamie } 2237185435Sbz } 2238191673Sjamie 2239191673Sjamie /* Write the fetched parameters back to userspace. */ 2240191673Sjamie error = 0; 2241191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2242191673Sjamie if (opt->pos >= 0 && opt->pos != errmsg_pos) { 2243191673Sjamie pos = 2 * opt->pos + 1; 2244191673Sjamie optuio->uio_iov[pos].iov_len = opt->len; 2245191673Sjamie if (opt->value != NULL) { 2246191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) { 2247191673Sjamie bcopy(opt->value, 2248191673Sjamie optuio->uio_iov[pos].iov_base, 2249191673Sjamie opt->len); 2250191673Sjamie } else { 2251191673Sjamie error = copyout(opt->value, 2252191673Sjamie optuio->uio_iov[pos].iov_base, 2253191673Sjamie opt->len); 2254191673Sjamie if (error) 2255191673Sjamie break; 2256191673Sjamie } 2257191673Sjamie } 2258191673Sjamie } 2259185435Sbz } 2260191673Sjamie goto done_errmsg; 2261191673Sjamie 2262191673Sjamie done_deref: 2263191673Sjamie prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); 2264191673Sjamie goto done_errmsg; 2265191673Sjamie 2266191673Sjamie done_unlock_list: 2267191673Sjamie sx_sunlock(&allprison_lock); 2268191673Sjamie done_errmsg: 2269191673Sjamie if (error && errmsg_pos >= 0) { 2270191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 2271191673Sjamie errmsg_pos = 2 * errmsg_pos + 1; 2272191673Sjamie if (errmsg_len > 0) { 2273191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 2274191673Sjamie bcopy(errmsg, 2275191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2276191673Sjamie errmsg_len); 2277191673Sjamie else 2278191673Sjamie copyout(errmsg, 2279191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2280191673Sjamie errmsg_len); 2281191673Sjamie } 2282185435Sbz } 2283191673Sjamie vfs_freeopts(opts); 2284191673Sjamie return (error); 2285191673Sjamie} 2286113275Smike 2287192895Sjamie 2288191673Sjamie/* 2289191673Sjamie * struct jail_remove_args { 2290191673Sjamie * int jid; 2291191673Sjamie * }; 2292191673Sjamie */ 2293191673Sjamieint 2294225617Skmacysys_jail_remove(struct thread *td, struct jail_remove_args *uap) 2295191673Sjamie{ 2296192895Sjamie struct prison *pr, *cpr, *lpr, *tpr; 2297192895Sjamie int descend, error; 2298185435Sbz 2299191673Sjamie error = priv_check(td, PRIV_JAIL_REMOVE); 2300185435Sbz if (error) 2301191673Sjamie return (error); 2302185435Sbz 2303185435Sbz sx_xlock(&allprison_lock); 2304192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2305191673Sjamie if (pr == NULL) { 2306185435Sbz sx_xunlock(&allprison_lock); 2307191673Sjamie return (EINVAL); 2308185435Sbz } 2309185435Sbz 2310192895Sjamie /* Remove all descendants of this prison, then remove this prison. */ 2311192895Sjamie pr->pr_ref++; 2312192895Sjamie if (!LIST_EMPTY(&pr->pr_children)) { 2313192895Sjamie mtx_unlock(&pr->pr_mtx); 2314192895Sjamie lpr = NULL; 2315192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 2316192895Sjamie mtx_lock(&cpr->pr_mtx); 2317192895Sjamie if (cpr->pr_ref > 0) { 2318192895Sjamie tpr = cpr; 2319192895Sjamie cpr->pr_ref++; 2320192895Sjamie } else { 2321192895Sjamie /* Already removed - do not do it again. */ 2322192895Sjamie tpr = NULL; 2323192895Sjamie } 2324192895Sjamie mtx_unlock(&cpr->pr_mtx); 2325192895Sjamie if (lpr != NULL) { 2326192895Sjamie mtx_lock(&lpr->pr_mtx); 2327192895Sjamie prison_remove_one(lpr); 2328192895Sjamie sx_xlock(&allprison_lock); 2329192895Sjamie } 2330192895Sjamie lpr = tpr; 2331192895Sjamie } 2332192895Sjamie if (lpr != NULL) { 2333192895Sjamie mtx_lock(&lpr->pr_mtx); 2334192895Sjamie prison_remove_one(lpr); 2335192895Sjamie sx_xlock(&allprison_lock); 2336192895Sjamie } 2337192895Sjamie mtx_lock(&pr->pr_mtx); 2338192895Sjamie } 2339192895Sjamie prison_remove_one(pr); 2340192895Sjamie return (0); 2341192895Sjamie} 2342192895Sjamie 2343192895Sjamiestatic void 2344192895Sjamieprison_remove_one(struct prison *pr) 2345192895Sjamie{ 2346192895Sjamie struct proc *p; 2347192895Sjamie int deuref; 2348192895Sjamie 2349191673Sjamie /* If the prison was persistent, it is not anymore. */ 2350191673Sjamie deuref = 0; 2351191673Sjamie if (pr->pr_flags & PR_PERSIST) { 2352191673Sjamie pr->pr_ref--; 2353191673Sjamie deuref = PD_DEUREF; 2354191673Sjamie pr->pr_flags &= ~PR_PERSIST; 2355179881Sdelphij } 2356113275Smike 2357192895Sjamie /* 2358192895Sjamie * jail_remove added a reference. If that's the only one, remove 2359192895Sjamie * the prison now. 2360192895Sjamie */ 2361192895Sjamie KASSERT(pr->pr_ref > 0, 2362192895Sjamie ("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id)); 2363192895Sjamie if (pr->pr_ref == 1) { 2364191673Sjamie prison_deref(pr, 2365191673Sjamie deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 2366192895Sjamie return; 2367191673Sjamie } 2368191673Sjamie 2369113275Smike mtx_unlock(&pr->pr_mtx); 2370191673Sjamie sx_xunlock(&allprison_lock); 2371191673Sjamie /* 2372191673Sjamie * Kill all processes unfortunate enough to be attached to this prison. 2373191673Sjamie */ 2374191673Sjamie sx_slock(&allproc_lock); 2375191673Sjamie LIST_FOREACH(p, &allproc, p_list) { 2376191673Sjamie PROC_LOCK(p); 2377191673Sjamie if (p->p_state != PRS_NEW && p->p_ucred && 2378191673Sjamie p->p_ucred->cr_prison == pr) 2379225617Skmacy kern_psignal(p, SIGKILL); 2380191673Sjamie PROC_UNLOCK(p); 2381191673Sjamie } 2382191673Sjamie sx_sunlock(&allproc_lock); 2383192895Sjamie /* Remove the temporary reference added by jail_remove. */ 2384191673Sjamie prison_deref(pr, deuref | PD_DEREF); 2385113275Smike} 2386113275Smike 2387190466Sjamie 2388113275Smike/* 2389114168Smike * struct jail_attach_args { 2390114168Smike * int jid; 2391114168Smike * }; 2392113275Smike */ 2393113275Smikeint 2394225617Skmacysys_jail_attach(struct thread *td, struct jail_attach_args *uap) 2395113275Smike{ 2396113275Smike struct prison *pr; 2397191673Sjamie int error; 2398167309Spjd 2399164032Srwatson error = priv_check(td, PRIV_JAIL_ATTACH); 2400126023Snectar if (error) 2401126023Snectar return (error); 2402126023Snectar 2403168401Spjd sx_slock(&allprison_lock); 2404192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2405113275Smike if (pr == NULL) { 2406168401Spjd sx_sunlock(&allprison_lock); 2407113275Smike return (EINVAL); 2408113275Smike } 2409185435Sbz 2410185435Sbz /* 2411185435Sbz * Do not allow a process to attach to a prison that is not 2412191673Sjamie * considered to be "alive". 2413185435Sbz */ 2414191673Sjamie if (pr->pr_uref == 0) { 2415185435Sbz mtx_unlock(&pr->pr_mtx); 2416185435Sbz sx_sunlock(&allprison_lock); 2417185435Sbz return (EINVAL); 2418185435Sbz } 2419191673Sjamie 2420191673Sjamie return (do_jail_attach(td, pr)); 2421191673Sjamie} 2422191673Sjamie 2423191673Sjamiestatic int 2424191673Sjamiedo_jail_attach(struct thread *td, struct prison *pr) 2425191673Sjamie{ 2426191673Sjamie struct proc *p; 2427191673Sjamie struct ucred *newcred, *oldcred; 2428241896Skib int error; 2429191673Sjamie 2430191673Sjamie /* 2431191673Sjamie * XXX: Note that there is a slight race here if two threads 2432191673Sjamie * in the same privileged process attempt to attach to two 2433191673Sjamie * different jails at the same time. It is important for 2434191673Sjamie * user processes not to do this, or they might end up with 2435191673Sjamie * a process root from one prison, but attached to the jail 2436191673Sjamie * of another. 2437191673Sjamie */ 2438113275Smike pr->pr_ref++; 2439191673Sjamie pr->pr_uref++; 2440113275Smike mtx_unlock(&pr->pr_mtx); 2441191673Sjamie 2442191673Sjamie /* Let modules do whatever they need to prepare for attaching. */ 2443191673Sjamie error = osd_jail_call(pr, PR_METHOD_ATTACH, td); 2444191673Sjamie if (error) { 2445191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); 2446191673Sjamie return (error); 2447191673Sjamie } 2448168401Spjd sx_sunlock(&allprison_lock); 2449113275Smike 2450185435Sbz /* 2451185435Sbz * Reparent the newly attached process to this jail. 2452185435Sbz */ 2453191673Sjamie p = td->td_proc; 2454185435Sbz error = cpuset_setproc_update_set(p, pr->pr_cpuset); 2455185435Sbz if (error) 2456191673Sjamie goto e_revert_osd; 2457185435Sbz 2458175202Sattilio vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); 2459113275Smike if ((error = change_dir(pr->pr_root, td)) != 0) 2460113275Smike goto e_unlock; 2461113275Smike#ifdef MAC 2462172930Srwatson if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) 2463113275Smike goto e_unlock; 2464113275Smike#endif 2465175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2466191673Sjamie if ((error = change_root(pr->pr_root, td))) 2467241896Skib goto e_revert_osd; 2468113275Smike 246984828Sjhb newcred = crget(); 247084828Sjhb PROC_LOCK(p); 2471298833Sjamie oldcred = crcopysafe(p, newcred); 2472113630Sjhb newcred->cr_prison = pr; 247384828Sjhb p->p_ucred = newcred; 2474298833Sjamie setsugid(p); 247584828Sjhb PROC_UNLOCK(p); 2476220137Strasz#ifdef RACCT 2477220137Strasz racct_proc_ucred_changed(p, oldcred, newcred); 2478220137Strasz#endif 2479298833Sjamie prison_deref(oldcred->cr_prison, PD_DEREF | PD_DEUREF); 248084828Sjhb crfree(oldcred); 248146155Sphk return (0); 2482298833Sjamie 2483191673Sjamie e_unlock: 2484175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2485191673Sjamie e_revert_osd: 2486191673Sjamie /* Tell modules this thread is still in its old jail after all. */ 2487298833Sjamie (void)osd_jail_call(td->td_ucred->cr_prison, PR_METHOD_ATTACH, td); 2488191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF); 248946155Sphk return (error); 249046155Sphk} 249146155Sphk 2492192895Sjamie 2493113275Smike/* 2494113275Smike * Returns a locked prison instance, or NULL on failure. 2495113275Smike */ 2496168399Spjdstruct prison * 2497113275Smikeprison_find(int prid) 2498113275Smike{ 2499113275Smike struct prison *pr; 2500113275Smike 2501168401Spjd sx_assert(&allprison_lock, SX_LOCKED); 2502191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2503113275Smike if (pr->pr_id == prid) { 2504113275Smike mtx_lock(&pr->pr_mtx); 2505191673Sjamie if (pr->pr_ref > 0) 2506191673Sjamie return (pr); 2507191673Sjamie mtx_unlock(&pr->pr_mtx); 2508113275Smike } 2509113275Smike } 2510113275Smike return (NULL); 2511113275Smike} 2512113275Smike 2513191673Sjamie/* 2514192895Sjamie * Find a prison that is a descendant of mypr. Returns a locked prison or NULL. 2515191673Sjamie */ 2516191673Sjamiestruct prison * 2517192895Sjamieprison_find_child(struct prison *mypr, int prid) 2518191673Sjamie{ 2519192895Sjamie struct prison *pr; 2520192895Sjamie int descend; 2521192895Sjamie 2522192895Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2523192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2524192895Sjamie if (pr->pr_id == prid) { 2525192895Sjamie mtx_lock(&pr->pr_mtx); 2526192895Sjamie if (pr->pr_ref > 0) 2527192895Sjamie return (pr); 2528192895Sjamie mtx_unlock(&pr->pr_mtx); 2529192895Sjamie } 2530192895Sjamie } 2531192895Sjamie return (NULL); 2532192895Sjamie} 2533192895Sjamie 2534192895Sjamie/* 2535192895Sjamie * Look for the name relative to mypr. Returns a locked prison or NULL. 2536192895Sjamie */ 2537192895Sjamiestruct prison * 2538192895Sjamieprison_find_name(struct prison *mypr, const char *name) 2539192895Sjamie{ 2540191673Sjamie struct prison *pr, *deadpr; 2541192895Sjamie size_t mylen; 2542192895Sjamie int descend; 2543191673Sjamie 2544191673Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2545192895Sjamie mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1; 2546191673Sjamie again: 2547191673Sjamie deadpr = NULL; 2548192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2549192895Sjamie if (!strcmp(pr->pr_name + mylen, name)) { 2550191673Sjamie mtx_lock(&pr->pr_mtx); 2551191673Sjamie if (pr->pr_ref > 0) { 2552191673Sjamie if (pr->pr_uref > 0) 2553191673Sjamie return (pr); 2554191673Sjamie deadpr = pr; 2555191673Sjamie } 2556191673Sjamie mtx_unlock(&pr->pr_mtx); 2557191673Sjamie } 2558191673Sjamie } 2559192895Sjamie /* There was no valid prison - perhaps there was a dying one. */ 2560191673Sjamie if (deadpr != NULL) { 2561191673Sjamie mtx_lock(&deadpr->pr_mtx); 2562191673Sjamie if (deadpr->pr_ref == 0) { 2563191673Sjamie mtx_unlock(&deadpr->pr_mtx); 2564191673Sjamie goto again; 2565191673Sjamie } 2566191673Sjamie } 2567191673Sjamie return (deadpr); 2568191673Sjamie} 2569191673Sjamie 2570191673Sjamie/* 2571192895Sjamie * See if a prison has the specific flag set. 2572192895Sjamie */ 2573192895Sjamieint 2574192895Sjamieprison_flag(struct ucred *cred, unsigned flag) 2575192895Sjamie{ 2576192895Sjamie 2577192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2578192895Sjamie return (cred->cr_prison->pr_flags & flag); 2579192895Sjamie} 2580192895Sjamie 2581192895Sjamieint 2582192895Sjamieprison_allow(struct ucred *cred, unsigned flag) 2583192895Sjamie{ 2584192895Sjamie 2585192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2586192895Sjamie return (cred->cr_prison->pr_allow & flag); 2587192895Sjamie} 2588192895Sjamie 2589192895Sjamie/* 2590191673Sjamie * Remove a prison reference. If that was the last reference, remove the 2591191673Sjamie * prison itself - but not in this context in case there are locks held. 2592191673Sjamie */ 259372786Srwatsonvoid 2594185029Spjdprison_free_locked(struct prison *pr) 259572786Srwatson{ 2596298833Sjamie int ref; 259772786Srwatson 2598185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2599298833Sjamie ref = --pr->pr_ref; 2600298833Sjamie mtx_unlock(&pr->pr_mtx); 2601298833Sjamie if (ref == 0) 2602144660Sjeff taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 260372786Srwatson} 260472786Srwatson 2605185029Spjdvoid 2606185029Spjdprison_free(struct prison *pr) 2607185029Spjd{ 2608185029Spjd 2609185029Spjd mtx_lock(&pr->pr_mtx); 2610185029Spjd prison_free_locked(pr); 2611185029Spjd} 2612185029Spjd 2613298833Sjamie/* 2614298833Sjamie * Complete a call to either prison_free or prison_proc_free. 2615298833Sjamie */ 2616124882Srwatsonstatic void 2617124882Srwatsonprison_complete(void *context, int pending) 2618124882Srwatson{ 2619298833Sjamie struct prison *pr = context; 2620191673Sjamie 2621298833Sjamie mtx_lock(&pr->pr_mtx); 2622298833Sjamie prison_deref(pr, pr->pr_uref 2623298833Sjamie ? PD_DEREF | PD_DEUREF | PD_LOCKED : PD_LOCKED); 2624191673Sjamie} 2625191673Sjamie 2626191673Sjamie/* 2627191673Sjamie * Remove a prison reference (usually). This internal version assumes no 2628191673Sjamie * mutexes are held, except perhaps the prison itself. If there are no more 2629191673Sjamie * references, release and delist the prison. On completion, the prison lock 2630191673Sjamie * and the allprison lock are both unlocked. 2631191673Sjamie */ 2632191673Sjamiestatic void 2633191673Sjamieprison_deref(struct prison *pr, int flags) 2634191673Sjamie{ 2635192895Sjamie struct prison *ppr, *tpr; 2636298833Sjamie int ref, lasturef; 2637124882Srwatson 2638191673Sjamie if (!(flags & PD_LOCKED)) 2639191673Sjamie mtx_lock(&pr->pr_mtx); 2640225191Sjamie for (;;) { 2641225191Sjamie if (flags & PD_DEUREF) { 2642298833Sjamie KASSERT(pr->pr_uref > 0, 2643298833Sjamie ("prison_deref PD_DEUREF on a dead prison (jid=%d)", 2644298833Sjamie pr->pr_id)); 2645225191Sjamie pr->pr_uref--; 2646298833Sjamie lasturef = pr->pr_uref == 0; 2647298833Sjamie if (lasturef) 2648298833Sjamie pr->pr_ref++; 2649225191Sjamie KASSERT(prison0.pr_uref != 0, ("prison0 pr_uref=0")); 2650298833Sjamie } else 2651298833Sjamie lasturef = 0; 2652298833Sjamie if (flags & PD_DEREF) { 2653298833Sjamie KASSERT(pr->pr_ref > 0, 2654298833Sjamie ("prison_deref PD_DEREF on a dead prison (jid=%d)", 2655298833Sjamie pr->pr_id)); 2656298833Sjamie pr->pr_ref--; 2657192895Sjamie } 2658298833Sjamie ref = pr->pr_ref; 2659298833Sjamie mtx_unlock(&pr->pr_mtx); 2660298833Sjamie 2661298833Sjamie /* 2662298833Sjamie * Tell the modules if the last user reference was removed 2663298833Sjamie * (even it sticks around in dying state). 2664298833Sjamie */ 2665298833Sjamie if (lasturef) { 2666298833Sjamie if (!(flags & (PD_LIST_SLOCKED | PD_LIST_XLOCKED))) { 2667298833Sjamie if (ref > 1) { 2668298833Sjamie sx_slock(&allprison_lock); 2669298833Sjamie flags |= PD_LIST_SLOCKED; 2670298833Sjamie } else { 2671298833Sjamie sx_xlock(&allprison_lock); 2672298833Sjamie flags |= PD_LIST_XLOCKED; 2673298833Sjamie } 2674298833Sjamie } 2675298833Sjamie (void)osd_jail_call(pr, PR_METHOD_REMOVE, NULL); 2676298833Sjamie mtx_lock(&pr->pr_mtx); 2677298833Sjamie ref = --pr->pr_ref; 2678298833Sjamie mtx_unlock(&pr->pr_mtx); 2679298833Sjamie } 2680298833Sjamie 2681192895Sjamie /* If the prison still has references, nothing else to do. */ 2682298833Sjamie if (ref > 0) { 2683192895Sjamie if (flags & PD_LIST_SLOCKED) 2684192895Sjamie sx_sunlock(&allprison_lock); 2685192895Sjamie else if (flags & PD_LIST_XLOCKED) 2686192895Sjamie sx_xunlock(&allprison_lock); 2687192895Sjamie return; 2688191673Sjamie } 2689191673Sjamie 2690192895Sjamie if (flags & PD_LIST_SLOCKED) { 2691192895Sjamie if (!sx_try_upgrade(&allprison_lock)) { 2692192895Sjamie sx_sunlock(&allprison_lock); 2693192895Sjamie sx_xlock(&allprison_lock); 2694192895Sjamie } 2695192895Sjamie } else if (!(flags & PD_LIST_XLOCKED)) 2696192895Sjamie sx_xlock(&allprison_lock); 2697168489Spjd 2698192895Sjamie TAILQ_REMOVE(&allprison, pr, pr_list); 2699192895Sjamie LIST_REMOVE(pr, pr_sibling); 2700192895Sjamie ppr = pr->pr_parent; 2701192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 2702194762Sjamie tpr->pr_childcount--; 2703196592Sjamie sx_xunlock(&allprison_lock); 2704192895Sjamie 2705194251Sjamie#ifdef VIMAGE 2706196505Szec if (pr->pr_vnet != ppr->pr_vnet) 2707194251Sjamie vnet_destroy(pr->pr_vnet); 2708194251Sjamie#endif 2709241896Skib if (pr->pr_root != NULL) 2710192895Sjamie vrele(pr->pr_root); 2711192895Sjamie mtx_destroy(&pr->pr_mtx); 2712191673Sjamie#ifdef INET 2713192895Sjamie free(pr->pr_ip4, M_PRISON); 2714191673Sjamie#endif 2715185435Sbz#ifdef INET6 2716192895Sjamie free(pr->pr_ip6, M_PRISON); 2717185435Sbz#endif 2718192895Sjamie if (pr->pr_cpuset != NULL) 2719192895Sjamie cpuset_rel(pr->pr_cpuset); 2720192895Sjamie osd_jail_exit(pr); 2721221362Strasz#ifdef RACCT 2722284665Strasz if (racct_enable) 2723284665Strasz prison_racct_detach(pr); 2724220163Strasz#endif 2725192895Sjamie free(pr, M_PRISON); 2726192895Sjamie 2727192895Sjamie /* Removing a prison frees a reference on its parent. */ 2728192895Sjamie pr = ppr; 2729192895Sjamie mtx_lock(&pr->pr_mtx); 2730225191Sjamie flags = PD_DEREF | PD_DEUREF; 2731192895Sjamie } 2732124882Srwatson} 2733124882Srwatson 273472786Srwatsonvoid 2735185029Spjdprison_hold_locked(struct prison *pr) 273672786Srwatson{ 273772786Srwatson 2738185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2739168489Spjd KASSERT(pr->pr_ref > 0, 2740191671Sjamie ("Trying to hold dead prison (jid=%d).", pr->pr_id)); 274172786Srwatson pr->pr_ref++; 2742185029Spjd} 2743185029Spjd 2744185029Spjdvoid 2745185029Spjdprison_hold(struct prison *pr) 2746185029Spjd{ 2747185029Spjd 2748185029Spjd mtx_lock(&pr->pr_mtx); 2749185029Spjd prison_hold_locked(pr); 275087275Srwatson mtx_unlock(&pr->pr_mtx); 275172786Srwatson} 275272786Srwatson 2753185435Sbzvoid 2754185435Sbzprison_proc_hold(struct prison *pr) 275587275Srwatson{ 275687275Srwatson 2757185435Sbz mtx_lock(&pr->pr_mtx); 2758191673Sjamie KASSERT(pr->pr_uref > 0, 2759191673Sjamie ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); 2760191673Sjamie pr->pr_uref++; 2761185435Sbz mtx_unlock(&pr->pr_mtx); 276287275Srwatson} 276387275Srwatson 2764185435Sbzvoid 2765185435Sbzprison_proc_free(struct prison *pr) 2766185435Sbz{ 2767185435Sbz 2768185435Sbz mtx_lock(&pr->pr_mtx); 2769191673Sjamie KASSERT(pr->pr_uref > 0, 2770191673Sjamie ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); 2771298833Sjamie if (pr->pr_uref > 1) 2772298833Sjamie pr->pr_uref--; 2773298833Sjamie else { 2774298833Sjamie /* 2775298833Sjamie * Don't remove the last user reference in this context, which 2776298833Sjamie * is expected to be a process that is not only locked, but 2777298833Sjamie * also half dead. 2778298833Sjamie */ 2779298833Sjamie pr->pr_ref++; 2780298833Sjamie mtx_unlock(&pr->pr_mtx); 2781298833Sjamie taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 2782298833Sjamie return; 2783298833Sjamie } 2784298833Sjamie mtx_unlock(&pr->pr_mtx); 2785185435Sbz} 2786185435Sbz 2787185435Sbz 2788185435Sbz#ifdef INET 2789185435Sbz/* 2790192895Sjamie * Restrict a prison's IP address list with its parent's, possibly replacing 2791192895Sjamie * it. Return true if the replacement buffer was used (or would have been). 2792192895Sjamie */ 2793192895Sjamiestatic int 2794192895Sjamieprison_restrict_ip4(struct prison *pr, struct in_addr *newip4) 2795192895Sjamie{ 2796192895Sjamie int ii, ij, used; 2797192895Sjamie struct prison *ppr; 2798192895Sjamie 2799192895Sjamie ppr = pr->pr_parent; 2800192895Sjamie if (!(pr->pr_flags & PR_IP4_USER)) { 2801192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2802192895Sjamie if (pr->pr_ip4s < ppr->pr_ip4s) { 2803192895Sjamie /* 2804192895Sjamie * There's no room for the parent's list. Use the 2805192895Sjamie * new list buffer, which is assumed to be big enough 2806192895Sjamie * (if it was passed). If there's no buffer, try to 2807192895Sjamie * allocate one. 2808192895Sjamie */ 2809192895Sjamie used = 1; 2810192895Sjamie if (newip4 == NULL) { 2811192895Sjamie newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4), 2812192895Sjamie M_PRISON, M_NOWAIT); 2813192895Sjamie if (newip4 != NULL) 2814192895Sjamie used = 0; 2815192895Sjamie } 2816192895Sjamie if (newip4 != NULL) { 2817192895Sjamie bcopy(ppr->pr_ip4, newip4, 2818192895Sjamie ppr->pr_ip4s * sizeof(*newip4)); 2819192895Sjamie free(pr->pr_ip4, M_PRISON); 2820192895Sjamie pr->pr_ip4 = newip4; 2821192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2822192895Sjamie } 2823192895Sjamie return (used); 2824192895Sjamie } 2825192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2826192895Sjamie if (pr->pr_ip4s > 0) 2827192895Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 2828192895Sjamie pr->pr_ip4s * sizeof(*newip4)); 2829192895Sjamie else if (pr->pr_ip4 != NULL) { 2830192895Sjamie free(pr->pr_ip4, M_PRISON); 2831192895Sjamie pr->pr_ip4 = NULL; 2832192895Sjamie } 2833195974Sjamie } else if (pr->pr_ip4s > 0) { 2834192895Sjamie /* Remove addresses that aren't in the parent. */ 2835192895Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 2836192895Sjamie if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 2837192895Sjamie break; 2838192895Sjamie if (ij < ppr->pr_ip4s) 2839192895Sjamie ii = 1; 2840192895Sjamie else { 2841192895Sjamie bcopy(pr->pr_ip4 + 1, pr->pr_ip4, 2842192895Sjamie --pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2843192895Sjamie ii = 0; 2844192895Sjamie } 2845192895Sjamie for (ij = 1; ii < pr->pr_ip4s; ) { 2846192895Sjamie if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) { 2847192895Sjamie ii++; 2848192895Sjamie continue; 2849192895Sjamie } 2850192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2851192895Sjamie qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) { 2852192895Sjamie case -1: 2853192895Sjamie bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii, 2854192895Sjamie (--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4)); 2855192895Sjamie break; 2856192895Sjamie case 0: 2857192895Sjamie ii++; 2858192895Sjamie ij++; 2859192895Sjamie break; 2860192895Sjamie case 1: 2861192895Sjamie ij++; 2862192895Sjamie break; 2863192895Sjamie } 2864192895Sjamie } 2865192895Sjamie if (pr->pr_ip4s == 0) { 2866195870Sjamie pr->pr_flags |= PR_IP4_DISABLE; 2867192895Sjamie free(pr->pr_ip4, M_PRISON); 2868192895Sjamie pr->pr_ip4 = NULL; 2869192895Sjamie } 2870192895Sjamie } 2871192895Sjamie return (0); 2872192895Sjamie} 2873192895Sjamie 2874192895Sjamie/* 2875185435Sbz * Pass back primary IPv4 address of this jail. 2876185435Sbz * 2877192895Sjamie * If not restricted return success but do not alter the address. Caller has 2878192895Sjamie * to make sure to initialize it correctly (e.g. INADDR_ANY). 2879185435Sbz * 2880188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2881188144Sjamie * Address returned in NBO. 2882185435Sbz */ 288346155Sphkint 2884187684Sbzprison_get_ip4(struct ucred *cred, struct in_addr *ia) 288546155Sphk{ 2886191673Sjamie struct prison *pr; 288746155Sphk 2888185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2889185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2890185435Sbz 2891192895Sjamie pr = cred->cr_prison; 2892192895Sjamie if (!(pr->pr_flags & PR_IP4)) 289346155Sphk return (0); 2894191673Sjamie mtx_lock(&pr->pr_mtx); 2895192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2896192895Sjamie mtx_unlock(&pr->pr_mtx); 2897192895Sjamie return (0); 2898192895Sjamie } 2899191673Sjamie if (pr->pr_ip4 == NULL) { 2900191673Sjamie mtx_unlock(&pr->pr_mtx); 2901188144Sjamie return (EAFNOSUPPORT); 2902191673Sjamie } 2903185435Sbz 2904191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2905191673Sjamie mtx_unlock(&pr->pr_mtx); 2906185435Sbz return (0); 2907185435Sbz} 2908185435Sbz 2909185435Sbz/* 2910202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 2911202468Sbz * We will return 0 if we should bypass source address selection in favour 2912202468Sbz * of the primary jail IPv4 address. Only in this case *ia will be updated and 2913202468Sbz * returned in NBO. 2914202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv4. 2915202468Sbz */ 2916202468Sbzint 2917202468Sbzprison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia) 2918202468Sbz{ 2919202468Sbz struct prison *pr; 2920202468Sbz struct in_addr lia; 2921202468Sbz int error; 2922202468Sbz 2923202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2924202468Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2925202468Sbz 2926202468Sbz if (!jailed(cred)) 2927202468Sbz return (1); 2928202468Sbz 2929202468Sbz pr = cred->cr_prison; 2930202468Sbz if (pr->pr_flags & PR_IP4_SADDRSEL) 2931202468Sbz return (1); 2932202468Sbz 2933202468Sbz lia.s_addr = INADDR_ANY; 2934202468Sbz error = prison_get_ip4(cred, &lia); 2935202468Sbz if (error) 2936202468Sbz return (error); 2937202468Sbz if (lia.s_addr == INADDR_ANY) 2938202468Sbz return (1); 2939202468Sbz 2940202468Sbz ia->s_addr = lia.s_addr; 2941202468Sbz return (0); 2942202468Sbz} 2943202468Sbz 2944202468Sbz/* 2945192895Sjamie * Return true if pr1 and pr2 have the same IPv4 address restrictions. 2946192895Sjamie */ 2947192895Sjamieint 2948192895Sjamieprison_equal_ip4(struct prison *pr1, struct prison *pr2) 2949192895Sjamie{ 2950192895Sjamie 2951192895Sjamie if (pr1 == pr2) 2952192895Sjamie return (1); 2953192895Sjamie 2954192895Sjamie /* 2955195974Sjamie * No need to lock since the PR_IP4_USER flag can't be altered for 2956195974Sjamie * existing prisons. 2957192895Sjamie */ 2958195945Sjamie while (pr1 != &prison0 && 2959195945Sjamie#ifdef VIMAGE 2960195945Sjamie !(pr1->pr_flags & PR_VNET) && 2961195945Sjamie#endif 2962195945Sjamie !(pr1->pr_flags & PR_IP4_USER)) 2963192895Sjamie pr1 = pr1->pr_parent; 2964195945Sjamie while (pr2 != &prison0 && 2965195945Sjamie#ifdef VIMAGE 2966195945Sjamie !(pr2->pr_flags & PR_VNET) && 2967195945Sjamie#endif 2968195945Sjamie !(pr2->pr_flags & PR_IP4_USER)) 2969192895Sjamie pr2 = pr2->pr_parent; 2970192895Sjamie return (pr1 == pr2); 2971192895Sjamie} 2972192895Sjamie 2973192895Sjamie/* 2974185435Sbz * Make sure our (source) address is set to something meaningful to this 2975185435Sbz * jail. 2976185435Sbz * 2977192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2978192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2979192895Sjamie * doesn't allow IPv4. Address passed in in NBO and returned in NBO. 2980185435Sbz */ 2981185435Sbzint 2982185435Sbzprison_local_ip4(struct ucred *cred, struct in_addr *ia) 2983185435Sbz{ 2984191673Sjamie struct prison *pr; 2985185435Sbz struct in_addr ia0; 2986191673Sjamie int error; 2987185435Sbz 2988185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2989185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2990185435Sbz 2991192895Sjamie pr = cred->cr_prison; 2992192895Sjamie if (!(pr->pr_flags & PR_IP4)) 299346155Sphk return (0); 2994191673Sjamie mtx_lock(&pr->pr_mtx); 2995192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2996192895Sjamie mtx_unlock(&pr->pr_mtx); 2997192895Sjamie return (0); 2998192895Sjamie } 2999191673Sjamie if (pr->pr_ip4 == NULL) { 3000191673Sjamie mtx_unlock(&pr->pr_mtx); 3001188144Sjamie return (EAFNOSUPPORT); 3002191673Sjamie } 3003185435Sbz 3004185435Sbz ia0.s_addr = ntohl(ia->s_addr); 3005185435Sbz if (ia0.s_addr == INADDR_LOOPBACK) { 3006191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 3007191673Sjamie mtx_unlock(&pr->pr_mtx); 3008185435Sbz return (0); 300946155Sphk } 3010185435Sbz 3011188144Sjamie if (ia0.s_addr == INADDR_ANY) { 3012188144Sjamie /* 3013188144Sjamie * In case there is only 1 IPv4 address, bind directly. 3014188144Sjamie */ 3015191673Sjamie if (pr->pr_ip4s == 1) 3016191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 3017191673Sjamie mtx_unlock(&pr->pr_mtx); 3018185435Sbz return (0); 3019185435Sbz } 3020185435Sbz 3021191673Sjamie error = _prison_check_ip4(pr, ia); 3022191673Sjamie mtx_unlock(&pr->pr_mtx); 3023191673Sjamie return (error); 3024185435Sbz} 3025185435Sbz 3026185435Sbz/* 3027185435Sbz * Rewrite destination address in case we will connect to loopback address. 3028185435Sbz * 3029188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 3030188144Sjamie * Address passed in in NBO and returned in NBO. 3031185435Sbz */ 3032185435Sbzint 3033185435Sbzprison_remote_ip4(struct ucred *cred, struct in_addr *ia) 3034185435Sbz{ 3035191673Sjamie struct prison *pr; 3036185435Sbz 3037185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3038185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 3039185435Sbz 3040192895Sjamie pr = cred->cr_prison; 3041192895Sjamie if (!(pr->pr_flags & PR_IP4)) 3042185435Sbz return (0); 3043191673Sjamie mtx_lock(&pr->pr_mtx); 3044192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 3045192895Sjamie mtx_unlock(&pr->pr_mtx); 3046192895Sjamie return (0); 3047192895Sjamie } 3048191673Sjamie if (pr->pr_ip4 == NULL) { 3049191673Sjamie mtx_unlock(&pr->pr_mtx); 3050188144Sjamie return (EAFNOSUPPORT); 3051191673Sjamie } 3052188144Sjamie 3053185435Sbz if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { 3054191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 3055191673Sjamie mtx_unlock(&pr->pr_mtx); 3056185435Sbz return (0); 3057185435Sbz } 3058185435Sbz 3059185435Sbz /* 3060185435Sbz * Return success because nothing had to be changed. 3061185435Sbz */ 3062191673Sjamie mtx_unlock(&pr->pr_mtx); 3063185435Sbz return (0); 3064185435Sbz} 3065185435Sbz 3066185435Sbz/* 3067188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3068185435Sbz * 3069192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 3070192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3071192895Sjamie * doesn't allow IPv4. Address passed in in NBO. 3072185435Sbz */ 3073185435Sbzstatic int 3074185435Sbz_prison_check_ip4(struct prison *pr, struct in_addr *ia) 3075185435Sbz{ 3076185435Sbz int i, a, z, d; 3077185435Sbz 3078185435Sbz /* 3079185435Sbz * Check the primary IP. 3080185435Sbz */ 3081185435Sbz if (pr->pr_ip4[0].s_addr == ia->s_addr) 3082188144Sjamie return (0); 3083185435Sbz 3084185435Sbz /* 3085185435Sbz * All the other IPs are sorted so we can do a binary search. 3086185435Sbz */ 3087185435Sbz a = 0; 3088185435Sbz z = pr->pr_ip4s - 2; 3089185435Sbz while (a <= z) { 3090185435Sbz i = (a + z) / 2; 3091185435Sbz d = qcmp_v4(&pr->pr_ip4[i+1], ia); 3092185435Sbz if (d > 0) 3093185435Sbz z = i - 1; 3094185435Sbz else if (d < 0) 3095185435Sbz a = i + 1; 309681114Srwatson else 3097188144Sjamie return (0); 3098185435Sbz } 3099188144Sjamie 3100188144Sjamie return (EADDRNOTAVAIL); 3101185435Sbz} 3102185435Sbz 3103185435Sbzint 3104185435Sbzprison_check_ip4(struct ucred *cred, struct in_addr *ia) 3105185435Sbz{ 3106191673Sjamie struct prison *pr; 3107191673Sjamie int error; 3108185435Sbz 3109185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3110185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 3111185435Sbz 3112192895Sjamie pr = cred->cr_prison; 3113192895Sjamie if (!(pr->pr_flags & PR_IP4)) 3114188144Sjamie return (0); 3115191673Sjamie mtx_lock(&pr->pr_mtx); 3116192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 3117192895Sjamie mtx_unlock(&pr->pr_mtx); 3118192895Sjamie return (0); 3119192895Sjamie } 3120191673Sjamie if (pr->pr_ip4 == NULL) { 3121191673Sjamie mtx_unlock(&pr->pr_mtx); 3122188144Sjamie return (EAFNOSUPPORT); 3123191673Sjamie } 3124185435Sbz 3125191673Sjamie error = _prison_check_ip4(pr, ia); 3126191673Sjamie mtx_unlock(&pr->pr_mtx); 3127191673Sjamie return (error); 3128185435Sbz} 3129185435Sbz#endif 3130185435Sbz 3131185435Sbz#ifdef INET6 3132192895Sjamiestatic int 3133192895Sjamieprison_restrict_ip6(struct prison *pr, struct in6_addr *newip6) 3134192895Sjamie{ 3135192895Sjamie int ii, ij, used; 3136192895Sjamie struct prison *ppr; 3137192895Sjamie 3138192895Sjamie ppr = pr->pr_parent; 3139192895Sjamie if (!(pr->pr_flags & PR_IP6_USER)) { 3140192895Sjamie /* This has no user settings, so just copy the parent's list. */ 3141192895Sjamie if (pr->pr_ip6s < ppr->pr_ip6s) { 3142192895Sjamie /* 3143192895Sjamie * There's no room for the parent's list. Use the 3144192895Sjamie * new list buffer, which is assumed to be big enough 3145192895Sjamie * (if it was passed). If there's no buffer, try to 3146192895Sjamie * allocate one. 3147192895Sjamie */ 3148192895Sjamie used = 1; 3149192895Sjamie if (newip6 == NULL) { 3150192895Sjamie newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6), 3151192895Sjamie M_PRISON, M_NOWAIT); 3152192895Sjamie if (newip6 != NULL) 3153192895Sjamie used = 0; 3154192895Sjamie } 3155192895Sjamie if (newip6 != NULL) { 3156192895Sjamie bcopy(ppr->pr_ip6, newip6, 3157192895Sjamie ppr->pr_ip6s * sizeof(*newip6)); 3158192895Sjamie free(pr->pr_ip6, M_PRISON); 3159192895Sjamie pr->pr_ip6 = newip6; 3160192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 3161192895Sjamie } 3162192895Sjamie return (used); 3163192895Sjamie } 3164192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 3165192895Sjamie if (pr->pr_ip6s > 0) 3166192895Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 3167192895Sjamie pr->pr_ip6s * sizeof(*newip6)); 3168192895Sjamie else if (pr->pr_ip6 != NULL) { 3169192895Sjamie free(pr->pr_ip6, M_PRISON); 3170192895Sjamie pr->pr_ip6 = NULL; 3171192895Sjamie } 3172195974Sjamie } else if (pr->pr_ip6s > 0) { 3173192895Sjamie /* Remove addresses that aren't in the parent. */ 3174192895Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 3175192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], 3176192895Sjamie &ppr->pr_ip6[ij])) 3177192895Sjamie break; 3178192895Sjamie if (ij < ppr->pr_ip6s) 3179192895Sjamie ii = 1; 3180192895Sjamie else { 3181192895Sjamie bcopy(pr->pr_ip6 + 1, pr->pr_ip6, 3182192895Sjamie --pr->pr_ip6s * sizeof(*pr->pr_ip6)); 3183192895Sjamie ii = 0; 3184192895Sjamie } 3185192895Sjamie for (ij = 1; ii < pr->pr_ip6s; ) { 3186192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii], 3187192895Sjamie &ppr->pr_ip6[0])) { 3188192895Sjamie ii++; 3189192895Sjamie continue; 3190192895Sjamie } 3191259847Sae switch (ij >= ppr->pr_ip6s ? -1 : 3192192895Sjamie qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) { 3193192895Sjamie case -1: 3194192895Sjamie bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii, 3195192895Sjamie (--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6)); 3196192895Sjamie break; 3197192895Sjamie case 0: 3198192895Sjamie ii++; 3199192895Sjamie ij++; 3200192895Sjamie break; 3201192895Sjamie case 1: 3202192895Sjamie ij++; 3203192895Sjamie break; 3204192895Sjamie } 3205192895Sjamie } 3206192895Sjamie if (pr->pr_ip6s == 0) { 3207195870Sjamie pr->pr_flags |= PR_IP6_DISABLE; 3208192895Sjamie free(pr->pr_ip6, M_PRISON); 3209192895Sjamie pr->pr_ip6 = NULL; 3210192895Sjamie } 3211192895Sjamie } 3212192895Sjamie return 0; 3213192895Sjamie} 3214192895Sjamie 3215185435Sbz/* 3216185435Sbz * Pass back primary IPv6 address for this jail. 3217185435Sbz * 3218192895Sjamie * If not restricted return success but do not alter the address. Caller has 3219192895Sjamie * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). 3220185435Sbz * 3221188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3222185435Sbz */ 3223185435Sbzint 3224187684Sbzprison_get_ip6(struct ucred *cred, struct in6_addr *ia6) 3225185435Sbz{ 3226191673Sjamie struct prison *pr; 3227185435Sbz 3228185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3229185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3230185435Sbz 3231192895Sjamie pr = cred->cr_prison; 3232192895Sjamie if (!(pr->pr_flags & PR_IP6)) 323381114Srwatson return (0); 3234191673Sjamie mtx_lock(&pr->pr_mtx); 3235192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3236192895Sjamie mtx_unlock(&pr->pr_mtx); 3237192895Sjamie return (0); 3238192895Sjamie } 3239191673Sjamie if (pr->pr_ip6 == NULL) { 3240191673Sjamie mtx_unlock(&pr->pr_mtx); 3241188144Sjamie return (EAFNOSUPPORT); 3242191673Sjamie } 3243188144Sjamie 3244191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3245191673Sjamie mtx_unlock(&pr->pr_mtx); 3246185435Sbz return (0); 3247185435Sbz} 3248185435Sbz 3249185435Sbz/* 3250202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 3251202468Sbz * We will return 0 if we should bypass source address selection in favour 3252202468Sbz * of the primary jail IPv6 address. Only in this case *ia will be updated and 3253202468Sbz * returned in NBO. 3254202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv6. 3255202468Sbz */ 3256202468Sbzint 3257202468Sbzprison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) 3258202468Sbz{ 3259202468Sbz struct prison *pr; 3260202468Sbz struct in6_addr lia6; 3261202468Sbz int error; 3262202468Sbz 3263202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3264202468Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3265202468Sbz 3266202468Sbz if (!jailed(cred)) 3267202468Sbz return (1); 3268202468Sbz 3269202468Sbz pr = cred->cr_prison; 3270202468Sbz if (pr->pr_flags & PR_IP6_SADDRSEL) 3271202468Sbz return (1); 3272202468Sbz 3273202468Sbz lia6 = in6addr_any; 3274202468Sbz error = prison_get_ip6(cred, &lia6); 3275202468Sbz if (error) 3276202468Sbz return (error); 3277202468Sbz if (IN6_IS_ADDR_UNSPECIFIED(&lia6)) 3278202468Sbz return (1); 3279202468Sbz 3280202468Sbz bcopy(&lia6, ia6, sizeof(struct in6_addr)); 3281202468Sbz return (0); 3282202468Sbz} 3283202468Sbz 3284202468Sbz/* 3285192895Sjamie * Return true if pr1 and pr2 have the same IPv6 address restrictions. 3286192895Sjamie */ 3287192895Sjamieint 3288192895Sjamieprison_equal_ip6(struct prison *pr1, struct prison *pr2) 3289192895Sjamie{ 3290192895Sjamie 3291192895Sjamie if (pr1 == pr2) 3292192895Sjamie return (1); 3293192895Sjamie 3294195945Sjamie while (pr1 != &prison0 && 3295195945Sjamie#ifdef VIMAGE 3296195945Sjamie !(pr1->pr_flags & PR_VNET) && 3297195945Sjamie#endif 3298195945Sjamie !(pr1->pr_flags & PR_IP6_USER)) 3299192895Sjamie pr1 = pr1->pr_parent; 3300195945Sjamie while (pr2 != &prison0 && 3301195945Sjamie#ifdef VIMAGE 3302195945Sjamie !(pr2->pr_flags & PR_VNET) && 3303195945Sjamie#endif 3304195945Sjamie !(pr2->pr_flags & PR_IP6_USER)) 3305192895Sjamie pr2 = pr2->pr_parent; 3306192895Sjamie return (pr1 == pr2); 3307192895Sjamie} 3308192895Sjamie 3309192895Sjamie/* 3310185435Sbz * Make sure our (source) address is set to something meaningful to this jail. 3311185435Sbz * 3312185435Sbz * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) 3313185435Sbz * when needed while binding. 3314185435Sbz * 3315192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3316192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3317192895Sjamie * doesn't allow IPv6. 3318185435Sbz */ 3319185435Sbzint 3320185435Sbzprison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) 3321185435Sbz{ 3322191673Sjamie struct prison *pr; 3323191673Sjamie int error; 3324185435Sbz 3325185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3326185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3327185435Sbz 3328192895Sjamie pr = cred->cr_prison; 3329192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3330185435Sbz return (0); 3331191673Sjamie mtx_lock(&pr->pr_mtx); 3332192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3333192895Sjamie mtx_unlock(&pr->pr_mtx); 3334192895Sjamie return (0); 3335192895Sjamie } 3336191673Sjamie if (pr->pr_ip6 == NULL) { 3337191673Sjamie mtx_unlock(&pr->pr_mtx); 3338188144Sjamie return (EAFNOSUPPORT); 3339191673Sjamie } 3340188144Sjamie 3341185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3342191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3343191673Sjamie mtx_unlock(&pr->pr_mtx); 3344185435Sbz return (0); 334581114Srwatson } 3346185435Sbz 3347188144Sjamie if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { 3348188144Sjamie /* 3349188144Sjamie * In case there is only 1 IPv6 address, and v6only is true, 3350188144Sjamie * then bind directly. 3351188144Sjamie */ 3352191673Sjamie if (v6only != 0 && pr->pr_ip6s == 1) 3353191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3354191673Sjamie mtx_unlock(&pr->pr_mtx); 3355185435Sbz return (0); 3356185435Sbz } 3357188144Sjamie 3358191673Sjamie error = _prison_check_ip6(pr, ia6); 3359191673Sjamie mtx_unlock(&pr->pr_mtx); 3360191673Sjamie return (error); 3361185435Sbz} 3362185435Sbz 3363185435Sbz/* 3364185435Sbz * Rewrite destination address in case we will connect to loopback address. 3365185435Sbz * 3366188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3367185435Sbz */ 3368185435Sbzint 3369185435Sbzprison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) 3370185435Sbz{ 3371191673Sjamie struct prison *pr; 3372185435Sbz 3373185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3374185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3375185435Sbz 3376192895Sjamie pr = cred->cr_prison; 3377192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3378185435Sbz return (0); 3379191673Sjamie mtx_lock(&pr->pr_mtx); 3380192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3381192895Sjamie mtx_unlock(&pr->pr_mtx); 3382192895Sjamie return (0); 3383192895Sjamie } 3384191673Sjamie if (pr->pr_ip6 == NULL) { 3385191673Sjamie mtx_unlock(&pr->pr_mtx); 3386188144Sjamie return (EAFNOSUPPORT); 3387191673Sjamie } 3388188144Sjamie 3389185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3390191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3391191673Sjamie mtx_unlock(&pr->pr_mtx); 3392185435Sbz return (0); 3393185435Sbz } 3394185435Sbz 3395185435Sbz /* 3396185435Sbz * Return success because nothing had to be changed. 3397185435Sbz */ 3398191673Sjamie mtx_unlock(&pr->pr_mtx); 339946155Sphk return (0); 340046155Sphk} 340146155Sphk 3402185435Sbz/* 3403188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3404185435Sbz * 3405192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3406192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3407192895Sjamie * doesn't allow IPv6. 3408185435Sbz */ 3409185435Sbzstatic int 3410185435Sbz_prison_check_ip6(struct prison *pr, struct in6_addr *ia6) 341146155Sphk{ 3412185435Sbz int i, a, z, d; 341346155Sphk 3414185435Sbz /* 3415185435Sbz * Check the primary IP. 3416185435Sbz */ 3417185435Sbz if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) 3418188144Sjamie return (0); 3419185435Sbz 3420185435Sbz /* 3421185435Sbz * All the other IPs are sorted so we can do a binary search. 3422185435Sbz */ 3423185435Sbz a = 0; 3424185435Sbz z = pr->pr_ip6s - 2; 3425185435Sbz while (a <= z) { 3426185435Sbz i = (a + z) / 2; 3427185435Sbz d = qcmp_v6(&pr->pr_ip6[i+1], ia6); 3428185435Sbz if (d > 0) 3429185435Sbz z = i - 1; 3430185435Sbz else if (d < 0) 3431185435Sbz a = i + 1; 343246155Sphk else 3433188144Sjamie return (0); 343446155Sphk } 3435188144Sjamie 3436188144Sjamie return (EADDRNOTAVAIL); 343746155Sphk} 343846155Sphk 343946155Sphkint 3440185435Sbzprison_check_ip6(struct ucred *cred, struct in6_addr *ia6) 3441185435Sbz{ 3442191673Sjamie struct prison *pr; 3443191673Sjamie int error; 3444185435Sbz 3445185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3446185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3447185435Sbz 3448192895Sjamie pr = cred->cr_prison; 3449192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3450188144Sjamie return (0); 3451191673Sjamie mtx_lock(&pr->pr_mtx); 3452192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3453192895Sjamie mtx_unlock(&pr->pr_mtx); 3454192895Sjamie return (0); 3455192895Sjamie } 3456191673Sjamie if (pr->pr_ip6 == NULL) { 3457191673Sjamie mtx_unlock(&pr->pr_mtx); 3458188144Sjamie return (EAFNOSUPPORT); 3459191673Sjamie } 3460185435Sbz 3461191673Sjamie error = _prison_check_ip6(pr, ia6); 3462191673Sjamie mtx_unlock(&pr->pr_mtx); 3463191673Sjamie return (error); 3464185435Sbz} 3465185435Sbz#endif 3466185435Sbz 3467185435Sbz/* 3468188146Sjamie * Check if a jail supports the given address family. 3469188146Sjamie * 3470188146Sjamie * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT 3471188146Sjamie * if not. 3472188146Sjamie */ 3473188146Sjamieint 3474188146Sjamieprison_check_af(struct ucred *cred, int af) 3475188146Sjamie{ 3476192895Sjamie struct prison *pr; 3477188146Sjamie int error; 3478188146Sjamie 3479188146Sjamie KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3480188146Sjamie 3481192895Sjamie pr = cred->cr_prison; 3482194923Sjamie#ifdef VIMAGE 3483194915Sjamie /* Prisons with their own network stack are not limited. */ 3484200473Sbz if (prison_owns_vnet(cred)) 3485194915Sjamie return (0); 3486194923Sjamie#endif 3487194915Sjamie 3488188146Sjamie error = 0; 3489188146Sjamie switch (af) 3490188146Sjamie { 3491188146Sjamie#ifdef INET 3492188146Sjamie case AF_INET: 3493192895Sjamie if (pr->pr_flags & PR_IP4) 3494192895Sjamie { 3495192895Sjamie mtx_lock(&pr->pr_mtx); 3496192895Sjamie if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL) 3497192895Sjamie error = EAFNOSUPPORT; 3498192895Sjamie mtx_unlock(&pr->pr_mtx); 3499192895Sjamie } 3500188146Sjamie break; 3501188146Sjamie#endif 3502188146Sjamie#ifdef INET6 3503188146Sjamie case AF_INET6: 3504192895Sjamie if (pr->pr_flags & PR_IP6) 3505192895Sjamie { 3506192895Sjamie mtx_lock(&pr->pr_mtx); 3507192895Sjamie if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL) 3508192895Sjamie error = EAFNOSUPPORT; 3509192895Sjamie mtx_unlock(&pr->pr_mtx); 3510192895Sjamie } 3511188146Sjamie break; 3512188146Sjamie#endif 3513188146Sjamie case AF_LOCAL: 3514188146Sjamie case AF_ROUTE: 3515188146Sjamie break; 3516188146Sjamie default: 3517192895Sjamie if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF)) 3518188146Sjamie error = EAFNOSUPPORT; 3519188146Sjamie } 3520188146Sjamie return (error); 3521188146Sjamie} 3522188146Sjamie 3523188146Sjamie/* 3524185435Sbz * Check if given address belongs to the jail referenced by cred (wrapper to 3525185435Sbz * prison_check_ip[46]). 3526185435Sbz * 3527192895Sjamie * Returns 0 if jail doesn't restrict the address family or if address belongs 3528192895Sjamie * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if 3529192895Sjamie * the jail doesn't allow the address family. IPv4 Address passed in in NBO. 3530185435Sbz */ 3531185435Sbzint 353272786Srwatsonprison_if(struct ucred *cred, struct sockaddr *sa) 353346155Sphk{ 3534185435Sbz#ifdef INET 3535114168Smike struct sockaddr_in *sai; 3536185435Sbz#endif 3537185435Sbz#ifdef INET6 3538185435Sbz struct sockaddr_in6 *sai6; 3539185435Sbz#endif 3540188144Sjamie int error; 354146155Sphk 3542185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3543185435Sbz KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); 3544185435Sbz 3545200473Sbz#ifdef VIMAGE 3546200473Sbz if (prison_owns_vnet(cred)) 3547200473Sbz return (0); 3548200473Sbz#endif 3549200473Sbz 3550188144Sjamie error = 0; 3551188144Sjamie switch (sa->sa_family) 3552185435Sbz { 3553185435Sbz#ifdef INET 3554185435Sbz case AF_INET: 3555185435Sbz sai = (struct sockaddr_in *)sa; 3556188144Sjamie error = prison_check_ip4(cred, &sai->sin_addr); 3557185435Sbz break; 3558185435Sbz#endif 3559185435Sbz#ifdef INET6 3560185435Sbz case AF_INET6: 3561185435Sbz sai6 = (struct sockaddr_in6 *)sa; 3562188144Sjamie error = prison_check_ip6(cred, &sai6->sin6_addr); 3563185435Sbz break; 3564185435Sbz#endif 3565185435Sbz default: 3566192895Sjamie if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF)) 3567188144Sjamie error = EAFNOSUPPORT; 3568185435Sbz } 3569188144Sjamie return (error); 357046155Sphk} 357172786Srwatson 357272786Srwatson/* 357372786Srwatson * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. 357472786Srwatson */ 357572786Srwatsonint 3576114168Smikeprison_check(struct ucred *cred1, struct ucred *cred2) 357772786Srwatson{ 357872786Srwatson 3579192895Sjamie return ((cred1->cr_prison == cred2->cr_prison || 3580192895Sjamie prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH); 3581192895Sjamie} 358272786Srwatson 3583192895Sjamie/* 3584192895Sjamie * Return 1 if p2 is a child of p1, otherwise 0. 3585192895Sjamie */ 3586192895Sjamieint 3587192895Sjamieprison_ischild(struct prison *pr1, struct prison *pr2) 3588192895Sjamie{ 3589192895Sjamie 3590192895Sjamie for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent) 3591192895Sjamie if (pr1 == pr2) 3592192895Sjamie return (1); 359372786Srwatson return (0); 359472786Srwatson} 359572786Srwatson 359672786Srwatson/* 359772786Srwatson * Return 1 if the passed credential is in a jail, otherwise 0. 359872786Srwatson */ 359972786Srwatsonint 3600114168Smikejailed(struct ucred *cred) 360172786Srwatson{ 360272786Srwatson 3603192895Sjamie return (cred->cr_prison != &prison0); 360472786Srwatson} 360591384Srobert 360691384Srobert/* 3607200473Sbz * Return 1 if the passed credential is in a jail and that jail does not 3608200473Sbz * have its own virtual network stack, otherwise 0. 3609200473Sbz */ 3610200473Sbzint 3611200473Sbzjailed_without_vnet(struct ucred *cred) 3612200473Sbz{ 3613200473Sbz 3614200473Sbz if (!jailed(cred)) 3615200473Sbz return (0); 3616200473Sbz#ifdef VIMAGE 3617200473Sbz if (prison_owns_vnet(cred)) 3618200473Sbz return (0); 3619200473Sbz#endif 3620200473Sbz 3621200473Sbz return (1); 3622200473Sbz} 3623200473Sbz 3624200473Sbz/* 3625194090Sjamie * Return the correct hostname (domainname, et al) for the passed credential. 362691384Srobert */ 362791391Srobertvoid 3628114168Smikegetcredhostname(struct ucred *cred, char *buf, size_t size) 362991384Srobert{ 3630193066Sjamie struct prison *pr; 363191384Srobert 3632194090Sjamie /* 3633194090Sjamie * A NULL credential can be used to shortcut to the physical 3634194090Sjamie * system's hostname. 3635194090Sjamie */ 3636193066Sjamie pr = (cred != NULL) ? cred->cr_prison : &prison0; 3637193066Sjamie mtx_lock(&pr->pr_mtx); 3638194118Sjamie strlcpy(buf, pr->pr_hostname, size); 3639193066Sjamie mtx_unlock(&pr->pr_mtx); 364091384Srobert} 3641113275Smike 3642194090Sjamievoid 3643194090Sjamiegetcreddomainname(struct ucred *cred, char *buf, size_t size) 3644194090Sjamie{ 3645194090Sjamie 3646194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3647194118Sjamie strlcpy(buf, cred->cr_prison->pr_domainname, size); 3648194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3649194090Sjamie} 3650194090Sjamie 3651194090Sjamievoid 3652194090Sjamiegetcredhostuuid(struct ucred *cred, char *buf, size_t size) 3653194090Sjamie{ 3654194090Sjamie 3655194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3656194118Sjamie strlcpy(buf, cred->cr_prison->pr_hostuuid, size); 3657194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3658194090Sjamie} 3659194090Sjamie 3660194090Sjamievoid 3661194090Sjamiegetcredhostid(struct ucred *cred, unsigned long *hostid) 3662194090Sjamie{ 3663194090Sjamie 3664194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3665194090Sjamie *hostid = cred->cr_prison->pr_hostid; 3666194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3667194090Sjamie} 3668194090Sjamie 3669196176Sbz#ifdef VIMAGE 3670125804Srwatson/* 3671196176Sbz * Determine whether the prison represented by cred owns 3672196176Sbz * its vnet rather than having it inherited. 3673196176Sbz * 3674196176Sbz * Returns 1 in case the prison owns the vnet, 0 otherwise. 3675196176Sbz */ 3676196176Sbzint 3677196176Sbzprison_owns_vnet(struct ucred *cred) 3678196176Sbz{ 3679196176Sbz 3680196176Sbz /* 3681196176Sbz * vnets cannot be added/removed after jail creation, 3682196176Sbz * so no need to lock here. 3683196176Sbz */ 3684196176Sbz return (cred->cr_prison->pr_flags & PR_VNET ? 1 : 0); 3685196176Sbz} 3686196176Sbz#endif 3687196176Sbz 3688196176Sbz/* 3689147185Spjd * Determine whether the subject represented by cred can "see" 3690147185Spjd * status of a mount point. 3691147185Spjd * Returns: 0 for permitted, ENOENT otherwise. 3692147185Spjd * XXX: This function should be called cr_canseemount() and should be 3693147185Spjd * placed in kern_prot.c. 3694125804Srwatson */ 3695125804Srwatsonint 3696147185Spjdprison_canseemount(struct ucred *cred, struct mount *mp) 3697125804Srwatson{ 3698147185Spjd struct prison *pr; 3699147185Spjd struct statfs *sp; 3700147185Spjd size_t len; 3701125804Srwatson 3702192895Sjamie pr = cred->cr_prison; 3703192895Sjamie if (pr->pr_enforce_statfs == 0) 3704147185Spjd return (0); 3705147185Spjd if (pr->pr_root->v_mount == mp) 3706147185Spjd return (0); 3707192895Sjamie if (pr->pr_enforce_statfs == 2) 3708147185Spjd return (ENOENT); 3709147185Spjd /* 3710147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3711147185Spjd * all mount-points from inside a jail. 3712147185Spjd * This is ugly check, but this is the only situation when jail's 3713147185Spjd * directory ends with '/'. 3714147185Spjd */ 3715147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3716147185Spjd return (0); 3717147185Spjd len = strlen(pr->pr_path); 3718147185Spjd sp = &mp->mnt_stat; 3719147185Spjd if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) 3720147185Spjd return (ENOENT); 3721147185Spjd /* 3722147185Spjd * Be sure that we don't have situation where jail's root directory 3723147185Spjd * is "/some/path" and mount point is "/some/pathpath". 3724147185Spjd */ 3725147185Spjd if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') 3726147185Spjd return (ENOENT); 3727147185Spjd return (0); 3728147185Spjd} 3729147185Spjd 3730147185Spjdvoid 3731147185Spjdprison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) 3732147185Spjd{ 3733147185Spjd char jpath[MAXPATHLEN]; 3734147185Spjd struct prison *pr; 3735147185Spjd size_t len; 3736147185Spjd 3737192895Sjamie pr = cred->cr_prison; 3738192895Sjamie if (pr->pr_enforce_statfs == 0) 3739147185Spjd return; 3740147185Spjd if (prison_canseemount(cred, mp) != 0) { 3741147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3742147185Spjd strlcpy(sp->f_mntonname, "[restricted]", 3743147185Spjd sizeof(sp->f_mntonname)); 3744147185Spjd return; 3745125804Srwatson } 3746147185Spjd if (pr->pr_root->v_mount == mp) { 3747147185Spjd /* 3748147185Spjd * Clear current buffer data, so we are sure nothing from 3749147185Spjd * the valid path left there. 3750147185Spjd */ 3751147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3752147185Spjd *sp->f_mntonname = '/'; 3753147185Spjd return; 3754147185Spjd } 3755147185Spjd /* 3756147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3757147185Spjd * all mount-points from inside a jail. 3758147185Spjd */ 3759147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3760147185Spjd return; 3761147185Spjd len = strlen(pr->pr_path); 3762147185Spjd strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); 3763147185Spjd /* 3764147185Spjd * Clear current buffer data, so we are sure nothing from 3765147185Spjd * the valid path left there. 3766147185Spjd */ 3767147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3768147185Spjd if (*jpath == '\0') { 3769147185Spjd /* Should never happen. */ 3770147185Spjd *sp->f_mntonname = '/'; 3771147185Spjd } else { 3772147185Spjd strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); 3773147185Spjd } 3774125804Srwatson} 3775125804Srwatson 3776164032Srwatson/* 3777164032Srwatson * Check with permission for a specific privilege is granted within jail. We 3778164032Srwatson * have a specific list of accepted privileges; the rest are denied. 3779164032Srwatson */ 3780164032Srwatsonint 3781164032Srwatsonprison_priv_check(struct ucred *cred, int priv) 3782164032Srwatson{ 3783164032Srwatson 3784164032Srwatson if (!jailed(cred)) 3785164032Srwatson return (0); 3786164032Srwatson 3787194915Sjamie#ifdef VIMAGE 3788194915Sjamie /* 3789194915Sjamie * Privileges specific to prisons with a virtual network stack. 3790194915Sjamie * There might be a duplicate entry here in case the privilege 3791194915Sjamie * is only granted conditionally in the legacy jail case. 3792194915Sjamie */ 3793164032Srwatson switch (priv) { 3794194915Sjamie#ifdef notyet 3795194915Sjamie /* 3796194915Sjamie * NFS-specific privileges. 3797194915Sjamie */ 3798194915Sjamie case PRIV_NFS_DAEMON: 3799194915Sjamie case PRIV_NFS_LOCKD: 3800194915Sjamie#endif 3801194915Sjamie /* 3802194915Sjamie * Network stack privileges. 3803194915Sjamie */ 3804194915Sjamie case PRIV_NET_BRIDGE: 3805194915Sjamie case PRIV_NET_GRE: 3806194915Sjamie case PRIV_NET_BPF: 3807194915Sjamie case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */ 3808194915Sjamie case PRIV_NET_ROUTE: 3809194915Sjamie case PRIV_NET_TAP: 3810194915Sjamie case PRIV_NET_SETIFMTU: 3811194915Sjamie case PRIV_NET_SETIFFLAGS: 3812194915Sjamie case PRIV_NET_SETIFCAP: 3813203052Sdelphij case PRIV_NET_SETIFDESCR: 3814194915Sjamie case PRIV_NET_SETIFNAME : 3815194915Sjamie case PRIV_NET_SETIFMETRIC: 3816194915Sjamie case PRIV_NET_SETIFPHYS: 3817194915Sjamie case PRIV_NET_SETIFMAC: 3818194915Sjamie case PRIV_NET_ADDMULTI: 3819194915Sjamie case PRIV_NET_DELMULTI: 3820194915Sjamie case PRIV_NET_HWIOCTL: 3821194915Sjamie case PRIV_NET_SETLLADDR: 3822194915Sjamie case PRIV_NET_ADDIFGROUP: 3823194915Sjamie case PRIV_NET_DELIFGROUP: 3824194915Sjamie case PRIV_NET_IFCREATE: 3825194915Sjamie case PRIV_NET_IFDESTROY: 3826194915Sjamie case PRIV_NET_ADDIFADDR: 3827194915Sjamie case PRIV_NET_DELIFADDR: 3828194915Sjamie case PRIV_NET_LAGG: 3829194915Sjamie case PRIV_NET_GIF: 3830194915Sjamie case PRIV_NET_SETIFVNET: 3831223735Sbz case PRIV_NET_SETIFFIB: 3832164032Srwatson 3833164032Srwatson /* 3834194915Sjamie * 802.11-related privileges. 3835194915Sjamie */ 3836194915Sjamie case PRIV_NET80211_GETKEY: 3837194915Sjamie#ifdef notyet 3838194915Sjamie case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */ 3839194915Sjamie#endif 3840194915Sjamie 3841194915Sjamie#ifdef notyet 3842194915Sjamie /* 3843194915Sjamie * AppleTalk privileges. 3844194915Sjamie */ 3845194915Sjamie case PRIV_NETATALK_RESERVEDPORT: 3846194915Sjamie 3847194915Sjamie /* 3848194915Sjamie * ATM privileges. 3849194915Sjamie */ 3850194915Sjamie case PRIV_NETATM_CFG: 3851194915Sjamie case PRIV_NETATM_ADD: 3852194915Sjamie case PRIV_NETATM_DEL: 3853194915Sjamie case PRIV_NETATM_SET: 3854194915Sjamie 3855194915Sjamie /* 3856194915Sjamie * Bluetooth privileges. 3857194915Sjamie */ 3858194915Sjamie case PRIV_NETBLUETOOTH_RAW: 3859194915Sjamie#endif 3860194915Sjamie 3861194915Sjamie /* 3862194915Sjamie * Netgraph and netgraph module privileges. 3863194915Sjamie */ 3864194915Sjamie case PRIV_NETGRAPH_CONTROL: 3865194915Sjamie#ifdef notyet 3866194915Sjamie case PRIV_NETGRAPH_TTY: 3867194915Sjamie#endif 3868194915Sjamie 3869194915Sjamie /* 3870194915Sjamie * IPv4 and IPv6 privileges. 3871194915Sjamie */ 3872194915Sjamie case PRIV_NETINET_IPFW: 3873194915Sjamie case PRIV_NETINET_DIVERT: 3874194915Sjamie case PRIV_NETINET_PF: 3875194915Sjamie case PRIV_NETINET_DUMMYNET: 3876194915Sjamie case PRIV_NETINET_CARP: 3877194915Sjamie case PRIV_NETINET_MROUTE: 3878194915Sjamie case PRIV_NETINET_RAW: 3879194915Sjamie case PRIV_NETINET_ADDRCTRL6: 3880194915Sjamie case PRIV_NETINET_ND6: 3881194915Sjamie case PRIV_NETINET_SCOPE6: 3882194915Sjamie case PRIV_NETINET_ALIFETIME6: 3883194915Sjamie case PRIV_NETINET_IPSEC: 3884194915Sjamie case PRIV_NETINET_BINDANY: 3885194915Sjamie 3886194915Sjamie#ifdef notyet 3887194915Sjamie /* 3888194915Sjamie * IPX/SPX privileges. 3889194915Sjamie */ 3890194915Sjamie case PRIV_NETIPX_RESERVEDPORT: 3891194915Sjamie case PRIV_NETIPX_RAW: 3892194915Sjamie 3893194915Sjamie /* 3894194915Sjamie * NCP privileges. 3895194915Sjamie */ 3896194915Sjamie case PRIV_NETNCP: 3897194915Sjamie 3898194915Sjamie /* 3899194915Sjamie * SMB privileges. 3900194915Sjamie */ 3901194915Sjamie case PRIV_NETSMB: 3902194915Sjamie#endif 3903194915Sjamie 3904194915Sjamie /* 3905194915Sjamie * No default: or deny here. 3906194915Sjamie * In case of no permit fall through to next switch(). 3907194915Sjamie */ 3908194915Sjamie if (cred->cr_prison->pr_flags & PR_VNET) 3909194915Sjamie return (0); 3910194915Sjamie } 3911194915Sjamie#endif /* VIMAGE */ 3912194915Sjamie 3913194915Sjamie switch (priv) { 3914194915Sjamie 3915194915Sjamie /* 3916164032Srwatson * Allow ktrace privileges for root in jail. 3917164032Srwatson */ 3918164032Srwatson case PRIV_KTRACE: 3919164032Srwatson 3920166827Srwatson#if 0 3921164032Srwatson /* 3922164032Srwatson * Allow jailed processes to configure audit identity and 3923164032Srwatson * submit audit records (login, etc). In the future we may 3924164032Srwatson * want to further refine the relationship between audit and 3925164032Srwatson * jail. 3926164032Srwatson */ 3927164032Srwatson case PRIV_AUDIT_GETAUDIT: 3928164032Srwatson case PRIV_AUDIT_SETAUDIT: 3929164032Srwatson case PRIV_AUDIT_SUBMIT: 3930166827Srwatson#endif 3931164032Srwatson 3932164032Srwatson /* 3933164032Srwatson * Allow jailed processes to manipulate process UNIX 3934164032Srwatson * credentials in any way they see fit. 3935164032Srwatson */ 3936164032Srwatson case PRIV_CRED_SETUID: 3937164032Srwatson case PRIV_CRED_SETEUID: 3938164032Srwatson case PRIV_CRED_SETGID: 3939164032Srwatson case PRIV_CRED_SETEGID: 3940164032Srwatson case PRIV_CRED_SETGROUPS: 3941164032Srwatson case PRIV_CRED_SETREUID: 3942164032Srwatson case PRIV_CRED_SETREGID: 3943164032Srwatson case PRIV_CRED_SETRESUID: 3944164032Srwatson case PRIV_CRED_SETRESGID: 3945164032Srwatson 3946164032Srwatson /* 3947164032Srwatson * Jail implements visibility constraints already, so allow 3948164032Srwatson * jailed root to override uid/gid-based constraints. 3949164032Srwatson */ 3950164032Srwatson case PRIV_SEEOTHERGIDS: 3951164032Srwatson case PRIV_SEEOTHERUIDS: 3952164032Srwatson 3953164032Srwatson /* 3954164032Srwatson * Jail implements inter-process debugging limits already, so 3955164032Srwatson * allow jailed root various debugging privileges. 3956164032Srwatson */ 3957164032Srwatson case PRIV_DEBUG_DIFFCRED: 3958164032Srwatson case PRIV_DEBUG_SUGID: 3959164032Srwatson case PRIV_DEBUG_UNPRIV: 3960164032Srwatson 3961164032Srwatson /* 3962164032Srwatson * Allow jail to set various resource limits and login 3963164032Srwatson * properties, and for now, exceed process resource limits. 3964164032Srwatson */ 3965164032Srwatson case PRIV_PROC_LIMIT: 3966164032Srwatson case PRIV_PROC_SETLOGIN: 3967164032Srwatson case PRIV_PROC_SETRLIMIT: 3968164032Srwatson 3969164032Srwatson /* 3970164032Srwatson * System V and POSIX IPC privileges are granted in jail. 3971164032Srwatson */ 3972164032Srwatson case PRIV_IPC_READ: 3973164032Srwatson case PRIV_IPC_WRITE: 3974164032Srwatson case PRIV_IPC_ADMIN: 3975164032Srwatson case PRIV_IPC_MSGSIZE: 3976164032Srwatson case PRIV_MQ_ADMIN: 3977164032Srwatson 3978164032Srwatson /* 3979192895Sjamie * Jail operations within a jail work on child jails. 3980192895Sjamie */ 3981192895Sjamie case PRIV_JAIL_ATTACH: 3982192895Sjamie case PRIV_JAIL_SET: 3983192895Sjamie case PRIV_JAIL_REMOVE: 3984192895Sjamie 3985192895Sjamie /* 3986164032Srwatson * Jail implements its own inter-process limits, so allow 3987164032Srwatson * root processes in jail to change scheduling on other 3988164032Srwatson * processes in the same jail. Likewise for signalling. 3989164032Srwatson */ 3990164032Srwatson case PRIV_SCHED_DIFFCRED: 3991185435Sbz case PRIV_SCHED_CPUSET: 3992164032Srwatson case PRIV_SIGNAL_DIFFCRED: 3993164032Srwatson case PRIV_SIGNAL_SUGID: 3994164032Srwatson 3995164032Srwatson /* 3996164032Srwatson * Allow jailed processes to write to sysctls marked as jail 3997164032Srwatson * writable. 3998164032Srwatson */ 3999164032Srwatson case PRIV_SYSCTL_WRITEJAIL: 4000164032Srwatson 4001164032Srwatson /* 4002164032Srwatson * Allow root in jail to manage a variety of quota 4003166831Srwatson * properties. These should likely be conditional on a 4004166831Srwatson * configuration option. 4005164032Srwatson */ 4006166832Srwatson case PRIV_VFS_GETQUOTA: 4007166832Srwatson case PRIV_VFS_SETQUOTA: 4008164032Srwatson 4009164032Srwatson /* 4010164032Srwatson * Since Jail relies on chroot() to implement file system 4011164032Srwatson * protections, grant many VFS privileges to root in jail. 4012164032Srwatson * Be careful to exclude mount-related and NFS-related 4013164032Srwatson * privileges. 4014164032Srwatson */ 4015164032Srwatson case PRIV_VFS_READ: 4016164032Srwatson case PRIV_VFS_WRITE: 4017164032Srwatson case PRIV_VFS_ADMIN: 4018164032Srwatson case PRIV_VFS_EXEC: 4019164032Srwatson case PRIV_VFS_LOOKUP: 4020164032Srwatson case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ 4021164032Srwatson case PRIV_VFS_CHFLAGS_DEV: 4022164032Srwatson case PRIV_VFS_CHOWN: 4023164032Srwatson case PRIV_VFS_CHROOT: 4024167152Spjd case PRIV_VFS_RETAINSUGID: 4025164032Srwatson case PRIV_VFS_FCHROOT: 4026164032Srwatson case PRIV_VFS_LINK: 4027164032Srwatson case PRIV_VFS_SETGID: 4028172860Srwatson case PRIV_VFS_STAT: 4029164032Srwatson case PRIV_VFS_STICKYFILE: 4030255316Sjamie 4031255316Sjamie /* 4032255316Sjamie * As in the non-jail case, non-root users are expected to be 4033255316Sjamie * able to read kernel/phyiscal memory (provided /dev/[k]mem 4034255316Sjamie * exists in the jail and they have permission to access it). 4035255316Sjamie */ 4036255316Sjamie case PRIV_KMEM_READ: 4037164032Srwatson return (0); 4038164032Srwatson 4039164032Srwatson /* 4040164032Srwatson * Depending on the global setting, allow privilege of 4041164032Srwatson * setting system flags. 4042164032Srwatson */ 4043164032Srwatson case PRIV_VFS_SYSFLAGS: 4044192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS) 4045164032Srwatson return (0); 4046164032Srwatson else 4047164032Srwatson return (EPERM); 4048164032Srwatson 4049164032Srwatson /* 4050168396Spjd * Depending on the global setting, allow privilege of 4051168396Spjd * mounting/unmounting file systems. 4052168396Spjd */ 4053168396Spjd case PRIV_VFS_MOUNT: 4054168396Spjd case PRIV_VFS_UNMOUNT: 4055168396Spjd case PRIV_VFS_MOUNT_NONUSER: 4056168699Spjd case PRIV_VFS_MOUNT_OWNER: 4057224615Smm if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT && 4058224615Smm cred->cr_prison->pr_enforce_statfs < 2) 4059168396Spjd return (0); 4060168396Spjd else 4061168396Spjd return (EPERM); 4062168396Spjd 4063168396Spjd /* 4064168591Srwatson * Allow jailed root to bind reserved ports and reuse in-use 4065168591Srwatson * ports. 4066164032Srwatson */ 4067164032Srwatson case PRIV_NETINET_RESERVEDPORT: 4068168591Srwatson case PRIV_NETINET_REUSEPORT: 4069164032Srwatson return (0); 4070164032Srwatson 4071164032Srwatson /* 4072175630Sbz * Allow jailed root to set certian IPv4/6 (option) headers. 4073175630Sbz */ 4074175630Sbz case PRIV_NETINET_SETHDROPTS: 4075175630Sbz return (0); 4076175630Sbz 4077175630Sbz /* 4078164032Srwatson * Conditionally allow creating raw sockets in jail. 4079164032Srwatson */ 4080164032Srwatson case PRIV_NETINET_RAW: 4081192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS) 4082164032Srwatson return (0); 4083164032Srwatson else 4084164032Srwatson return (EPERM); 4085164032Srwatson 4086164032Srwatson /* 4087164032Srwatson * Since jail implements its own visibility limits on netstat 4088164032Srwatson * sysctls, allow getcred. This allows identd to work in 4089164032Srwatson * jail. 4090164032Srwatson */ 4091164032Srwatson case PRIV_NETINET_GETCRED: 4092164032Srwatson return (0); 4093164032Srwatson 4094219304Strasz /* 4095219304Strasz * Allow jailed root to set loginclass. 4096219304Strasz */ 4097219304Strasz case PRIV_PROC_SETLOGINCLASS: 4098219304Strasz return (0); 4099219304Strasz 4100164032Srwatson default: 4101164032Srwatson /* 4102164032Srwatson * In all remaining cases, deny the privilege request. This 4103164032Srwatson * includes almost all network privileges, many system 4104164032Srwatson * configuration privileges. 4105164032Srwatson */ 4106164032Srwatson return (EPERM); 4107164032Srwatson } 4108164032Srwatson} 4109164032Srwatson 4110192895Sjamie/* 4111192895Sjamie * Return the part of pr2's name that is relative to pr1, or the whole name 4112192895Sjamie * if it does not directly follow. 4113192895Sjamie */ 4114192895Sjamie 4115192895Sjamiechar * 4116192895Sjamieprison_name(struct prison *pr1, struct prison *pr2) 4117192895Sjamie{ 4118192895Sjamie char *name; 4119192895Sjamie 4120192895Sjamie /* Jails see themselves as "0" (if they see themselves at all). */ 4121192895Sjamie if (pr1 == pr2) 4122192895Sjamie return "0"; 4123192895Sjamie name = pr2->pr_name; 4124192895Sjamie if (prison_ischild(pr1, pr2)) { 4125192895Sjamie /* 4126192895Sjamie * pr1 isn't locked (and allprison_lock may not be either) 4127192895Sjamie * so its length can't be counted on. But the number of dots 4128192895Sjamie * can be counted on - and counted. 4129192895Sjamie */ 4130192895Sjamie for (; pr1 != &prison0; pr1 = pr1->pr_parent) 4131192895Sjamie name = strchr(name, '.') + 1; 4132192895Sjamie } 4133192895Sjamie return (name); 4134192895Sjamie} 4135192895Sjamie 4136192895Sjamie/* 4137192895Sjamie * Return the part of pr2's path that is relative to pr1, or the whole path 4138192895Sjamie * if it does not directly follow. 4139192895Sjamie */ 4140192895Sjamiestatic char * 4141192895Sjamieprison_path(struct prison *pr1, struct prison *pr2) 4142192895Sjamie{ 4143192895Sjamie char *path1, *path2; 4144192895Sjamie int len1; 4145192895Sjamie 4146192895Sjamie path1 = pr1->pr_path; 4147192895Sjamie path2 = pr2->pr_path; 4148192895Sjamie if (!strcmp(path1, "/")) 4149192895Sjamie return (path2); 4150192895Sjamie len1 = strlen(path1); 4151192895Sjamie if (strncmp(path1, path2, len1)) 4152192895Sjamie return (path2); 4153192895Sjamie if (path2[len1] == '\0') 4154192895Sjamie return "/"; 4155192895Sjamie if (path2[len1] == '/') 4156192895Sjamie return (path2 + len1); 4157192895Sjamie return (path2); 4158192895Sjamie} 4159192895Sjamie 4160192895Sjamie 4161192895Sjamie/* 4162192895Sjamie * Jail-related sysctls. 4163192895Sjamie */ 4164227309Sedstatic SYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, 4165192895Sjamie "Jails"); 4166192895Sjamie 4167113275Smikestatic int 4168113275Smikesysctl_jail_list(SYSCTL_HANDLER_ARGS) 4169113275Smike{ 4170191673Sjamie struct xprison *xp; 4171192895Sjamie struct prison *pr, *cpr; 4172191673Sjamie#ifdef INET 4173191673Sjamie struct in_addr *ip4 = NULL; 4174191673Sjamie int ip4s = 0; 4175191673Sjamie#endif 4176191673Sjamie#ifdef INET6 4177208803Scperciva struct in6_addr *ip6 = NULL; 4178191673Sjamie int ip6s = 0; 4179191673Sjamie#endif 4180192895Sjamie int descend, error; 4181113275Smike 4182191673Sjamie xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); 4183192895Sjamie pr = req->td->td_ucred->cr_prison; 4184191673Sjamie error = 0; 4185168401Spjd sx_slock(&allprison_lock); 4186192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 4187192895Sjamie#if defined(INET) || defined(INET6) 4188191673Sjamie again: 4189192895Sjamie#endif 4190192895Sjamie mtx_lock(&cpr->pr_mtx); 4191185435Sbz#ifdef INET 4192192895Sjamie if (cpr->pr_ip4s > 0) { 4193192895Sjamie if (ip4s < cpr->pr_ip4s) { 4194192895Sjamie ip4s = cpr->pr_ip4s; 4195192895Sjamie mtx_unlock(&cpr->pr_mtx); 4196191673Sjamie ip4 = realloc(ip4, ip4s * 4197191673Sjamie sizeof(struct in_addr), M_TEMP, M_WAITOK); 4198191673Sjamie goto again; 4199191673Sjamie } 4200192895Sjamie bcopy(cpr->pr_ip4, ip4, 4201192895Sjamie cpr->pr_ip4s * sizeof(struct in_addr)); 4202191673Sjamie } 4203185435Sbz#endif 4204185435Sbz#ifdef INET6 4205192895Sjamie if (cpr->pr_ip6s > 0) { 4206192895Sjamie if (ip6s < cpr->pr_ip6s) { 4207192895Sjamie ip6s = cpr->pr_ip6s; 4208192895Sjamie mtx_unlock(&cpr->pr_mtx); 4209191673Sjamie ip6 = realloc(ip6, ip6s * 4210191673Sjamie sizeof(struct in6_addr), M_TEMP, M_WAITOK); 4211191673Sjamie goto again; 4212191673Sjamie } 4213192895Sjamie bcopy(cpr->pr_ip6, ip6, 4214192895Sjamie cpr->pr_ip6s * sizeof(struct in6_addr)); 4215191673Sjamie } 4216185435Sbz#endif 4217192895Sjamie if (cpr->pr_ref == 0) { 4218192895Sjamie mtx_unlock(&cpr->pr_mtx); 4219191673Sjamie continue; 4220191673Sjamie } 4221191673Sjamie bzero(xp, sizeof(*xp)); 4222113275Smike xp->pr_version = XPRISON_VERSION; 4223192895Sjamie xp->pr_id = cpr->pr_id; 4224192895Sjamie xp->pr_state = cpr->pr_uref > 0 4225191673Sjamie ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; 4226192895Sjamie strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path)); 4227194118Sjamie strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host)); 4228192895Sjamie strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name)); 4229185435Sbz#ifdef INET 4230192895Sjamie xp->pr_ip4s = cpr->pr_ip4s; 4231185435Sbz#endif 4232185435Sbz#ifdef INET6 4233192895Sjamie xp->pr_ip6s = cpr->pr_ip6s; 4234185435Sbz#endif 4235192895Sjamie mtx_unlock(&cpr->pr_mtx); 4236191673Sjamie error = SYSCTL_OUT(req, xp, sizeof(*xp)); 4237191673Sjamie if (error) 4238191673Sjamie break; 4239185435Sbz#ifdef INET 4240191673Sjamie if (xp->pr_ip4s > 0) { 4241191673Sjamie error = SYSCTL_OUT(req, ip4, 4242191673Sjamie xp->pr_ip4s * sizeof(struct in_addr)); 4243191673Sjamie if (error) 4244191673Sjamie break; 4245185435Sbz } 4246185435Sbz#endif 4247185435Sbz#ifdef INET6 4248191673Sjamie if (xp->pr_ip6s > 0) { 4249191673Sjamie error = SYSCTL_OUT(req, ip6, 4250191673Sjamie xp->pr_ip6s * sizeof(struct in6_addr)); 4251191673Sjamie if (error) 4252191673Sjamie break; 4253185435Sbz } 4254185435Sbz#endif 4255113275Smike } 4256168401Spjd sx_sunlock(&allprison_lock); 4257191673Sjamie free(xp, M_TEMP); 4258191673Sjamie#ifdef INET 4259191673Sjamie free(ip4, M_TEMP); 4260191673Sjamie#endif 4261191673Sjamie#ifdef INET6 4262191673Sjamie free(ip6, M_TEMP); 4263191673Sjamie#endif 4264167354Spjd return (error); 4265113275Smike} 4266113275Smike 4267187864SedSYSCTL_OID(_security_jail, OID_AUTO, list, 4268187864Sed CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4269187864Sed sysctl_jail_list, "S", "List of active jails"); 4270126004Spjd 4271126004Spjdstatic int 4272126004Spjdsysctl_jail_jailed(SYSCTL_HANDLER_ARGS) 4273126004Spjd{ 4274126004Spjd int error, injail; 4275126004Spjd 4276126004Spjd injail = jailed(req->td->td_ucred); 4277126004Spjd error = SYSCTL_OUT(req, &injail, sizeof(injail)); 4278126004Spjd 4279126004Spjd return (error); 4280126004Spjd} 4281192895Sjamie 4282187864SedSYSCTL_PROC(_security_jail, OID_AUTO, jailed, 4283187864Sed CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4284187864Sed sysctl_jail_jailed, "I", "Process in jail?"); 4285185435Sbz 4286250804Sjamiestatic int 4287250804Sjamiesysctl_jail_vnet(SYSCTL_HANDLER_ARGS) 4288250804Sjamie{ 4289250804Sjamie int error, havevnet; 4290250804Sjamie#ifdef VIMAGE 4291250804Sjamie struct ucred *cred = req->td->td_ucred; 4292250804Sjamie 4293250804Sjamie havevnet = jailed(cred) && prison_owns_vnet(cred); 4294250804Sjamie#else 4295250804Sjamie havevnet = 0; 4296250804Sjamie#endif 4297250804Sjamie error = SYSCTL_OUT(req, &havevnet, sizeof(havevnet)); 4298250804Sjamie 4299250804Sjamie return (error); 4300250804Sjamie} 4301250804Sjamie 4302250804SjamieSYSCTL_PROC(_security_jail, OID_AUTO, vnet, 4303250804Sjamie CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4304250804Sjamie sysctl_jail_vnet, "I", "Jail owns VNET?"); 4305250804Sjamie 4306192895Sjamie#if defined(INET) || defined(INET6) 4307193865SjamieSYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, 4308192895Sjamie &jail_max_af_ips, 0, 4309301905Sjamie "Number of IP addresses a jail may have at most per address family (deprecated)"); 4310192895Sjamie#endif 4311192895Sjamie 4312192895Sjamie/* 4313192895Sjamie * Default parameters for jail(2) compatability. For historical reasons, 4314192895Sjamie * the sysctl names have varying similarity to the parameter names. Prisons 4315192895Sjamie * just see their own parameters, and can't change them. 4316192895Sjamie */ 4317192895Sjamiestatic int 4318192895Sjamiesysctl_jail_default_allow(SYSCTL_HANDLER_ARGS) 4319192895Sjamie{ 4320192895Sjamie struct prison *pr; 4321192895Sjamie int allow, error, i; 4322192895Sjamie 4323192895Sjamie pr = req->td->td_ucred->cr_prison; 4324192895Sjamie allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow; 4325192895Sjamie 4326192895Sjamie /* Get the current flag value, and convert it to a boolean. */ 4327192895Sjamie i = (allow & arg2) ? 1 : 0; 4328192895Sjamie if (arg1 != NULL) 4329192895Sjamie i = !i; 4330192895Sjamie error = sysctl_handle_int(oidp, &i, 0, req); 4331192895Sjamie if (error || !req->newptr) 4332192895Sjamie return (error); 4333192895Sjamie i = i ? arg2 : 0; 4334192895Sjamie if (arg1 != NULL) 4335192895Sjamie i ^= arg2; 4336192895Sjamie /* 4337192895Sjamie * The sysctls don't have CTLFLAGS_PRISON, so assume prison0 4338192895Sjamie * for writing. 4339192895Sjamie */ 4340192895Sjamie mtx_lock(&prison0.pr_mtx); 4341192895Sjamie jail_default_allow = (jail_default_allow & ~arg2) | i; 4342192895Sjamie mtx_unlock(&prison0.pr_mtx); 4343192895Sjamie return (0); 4344192895Sjamie} 4345192895Sjamie 4346192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed, 4347192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4348192895Sjamie NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I", 4349301905Sjamie "Processes in jail can set their hostnames (deprecated)"); 4350192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only, 4351192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4352192895Sjamie (void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I", 4353301905Sjamie "Processes in jail are limited to creating UNIX/IP/route sockets only (deprecated)"); 4354192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed, 4355192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4356192895Sjamie NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I", 4357301905Sjamie "Processes in jail can use System V IPC primitives (deprecated)"); 4358192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets, 4359192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4360192895Sjamie NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I", 4361301905Sjamie "Prison root can create raw sockets (deprecated)"); 4362192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed, 4363192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4364192895Sjamie NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I", 4365301905Sjamie "Processes in jail can alter system file flags (deprecated)"); 4366192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed, 4367192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4368192895Sjamie NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I", 4369301905Sjamie "Processes in jail can mount/unmount jail-friendly file systems (deprecated)"); 4370232059SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_devfs_allowed, 4371232059Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4372232059Smm NULL, PR_ALLOW_MOUNT_DEVFS, sysctl_jail_default_allow, "I", 4373301905Sjamie "Processes in jail can mount the devfs file system (deprecated)"); 4374277985SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_fdescfs_allowed, 4375277985Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4376277985Sjamie NULL, PR_ALLOW_MOUNT_FDESCFS, sysctl_jail_default_allow, "I", 4377301905Sjamie "Processes in jail can mount the fdescfs file system (deprecated)"); 4378232059SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_nullfs_allowed, 4379232059Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4380232059Smm NULL, PR_ALLOW_MOUNT_NULLFS, sysctl_jail_default_allow, "I", 4381301905Sjamie "Processes in jail can mount the nullfs file system (deprecated)"); 4382232278SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_procfs_allowed, 4383232278Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4384232278Smm NULL, PR_ALLOW_MOUNT_PROCFS, sysctl_jail_default_allow, "I", 4385301905Sjamie "Processes in jail can mount the procfs file system (deprecated)"); 4386295951SaraujoSYSCTL_PROC(_security_jail, OID_AUTO, mount_linprocfs_allowed, 4387295951Saraujo CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4388295951Saraujo NULL, PR_ALLOW_MOUNT_LINPROCFS, sysctl_jail_default_allow, "I", 4389301905Sjamie "Processes in jail can mount the linprocfs file system (deprecated)"); 4390295951SaraujoSYSCTL_PROC(_security_jail, OID_AUTO, mount_linsysfs_allowed, 4391295951Saraujo CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4392295951Saraujo NULL, PR_ALLOW_MOUNT_LINSYSFS, sysctl_jail_default_allow, "I", 4393301905Sjamie "Processes in jail can mount the linsysfs file system (deprecated)"); 4394254741SdelphijSYSCTL_PROC(_security_jail, OID_AUTO, mount_tmpfs_allowed, 4395254741Sdelphij CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4396254741Sdelphij NULL, PR_ALLOW_MOUNT_TMPFS, sysctl_jail_default_allow, "I", 4397301905Sjamie "Processes in jail can mount the tmpfs file system (deprecated)"); 4398232186SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_zfs_allowed, 4399232186Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4400232186Smm NULL, PR_ALLOW_MOUNT_ZFS, sysctl_jail_default_allow, "I", 4401301905Sjamie "Processes in jail can mount the zfs file system (deprecated)"); 4402192895Sjamie 4403192895Sjamiestatic int 4404192895Sjamiesysctl_jail_default_level(SYSCTL_HANDLER_ARGS) 4405192895Sjamie{ 4406192895Sjamie struct prison *pr; 4407192895Sjamie int level, error; 4408192895Sjamie 4409192895Sjamie pr = req->td->td_ucred->cr_prison; 4410192895Sjamie level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2); 4411192895Sjamie error = sysctl_handle_int(oidp, &level, 0, req); 4412192895Sjamie if (error || !req->newptr) 4413192895Sjamie return (error); 4414192895Sjamie *(int *)arg1 = level; 4415192895Sjamie return (0); 4416192895Sjamie} 4417192895Sjamie 4418192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs, 4419192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4420192895Sjamie &jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs), 4421192895Sjamie sysctl_jail_default_level, "I", 4422301905Sjamie "Processes in jail cannot see all mounted file systems (deprecated)"); 4423192895Sjamie 4424231267SmmSYSCTL_PROC(_security_jail, OID_AUTO, devfs_ruleset, 4425231267Smm CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, 4426231267Smm &jail_default_devfs_rsnum, offsetof(struct prison, pr_devfs_rsnum), 4427231267Smm sysctl_jail_default_level, "I", 4428301905Sjamie "Ruleset for the devfs filesystem in jail (deprecated)"); 4429231267Smm 4430192895Sjamie/* 4431192895Sjamie * Nodes to describe jail parameters. Maximum length of string parameters 4432192895Sjamie * is returned in the string itself, and the other parameters exist merely 4433192895Sjamie * to make themselves and their types known. 4434192895Sjamie */ 4435192895SjamieSYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, 4436192895Sjamie "Jail parameters"); 4437192895Sjamie 4438192895Sjamieint 4439192895Sjamiesysctl_jail_param(SYSCTL_HANDLER_ARGS) 4440192895Sjamie{ 4441192895Sjamie int i; 4442192895Sjamie long l; 4443192895Sjamie size_t s; 4444192895Sjamie char numbuf[12]; 4445192895Sjamie 4446192895Sjamie switch (oidp->oid_kind & CTLTYPE) 4447192895Sjamie { 4448192895Sjamie case CTLTYPE_LONG: 4449192895Sjamie case CTLTYPE_ULONG: 4450192895Sjamie l = 0; 4451192895Sjamie#ifdef SCTL_MASK32 4452192895Sjamie if (!(req->flags & SCTL_MASK32)) 4453192895Sjamie#endif 4454192895Sjamie return (SYSCTL_OUT(req, &l, sizeof(l))); 4455192895Sjamie case CTLTYPE_INT: 4456192895Sjamie case CTLTYPE_UINT: 4457192895Sjamie i = 0; 4458192895Sjamie return (SYSCTL_OUT(req, &i, sizeof(i))); 4459192895Sjamie case CTLTYPE_STRING: 4460219819Sjeff snprintf(numbuf, sizeof(numbuf), "%jd", (intmax_t)arg2); 4461192895Sjamie return 4462192895Sjamie (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); 4463192895Sjamie case CTLTYPE_STRUCT: 4464192895Sjamie s = (size_t)arg2; 4465192895Sjamie return (SYSCTL_OUT(req, &s, sizeof(s))); 4466192895Sjamie } 4467192895Sjamie return (0); 4468192895Sjamie} 4469192895Sjamie 4470280632Sian/* 4471280632Sian * CTLFLAG_RDTUN in the following indicates jail parameters that can be set at 4472280632Sian * jail creation time but cannot be changed in an existing jail. 4473280632Sian */ 4474192895SjamieSYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID"); 4475192895SjamieSYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID"); 4476192895SjamieSYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); 4477192895SjamieSYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path"); 4478192895SjamieSYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, 4479192895Sjamie "I", "Jail secure level"); 4480280632SianSYSCTL_JAIL_PARAM(, osreldate, CTLTYPE_INT | CTLFLAG_RDTUN, "I", 4481280632Sian "Jail value for kern.osreldate and uname -K"); 4482280632SianSYSCTL_JAIL_PARAM_STRING(, osrelease, CTLFLAG_RDTUN, OSRELEASELEN, 4483280632Sian "Jail value for kern.osrelease and uname -r"); 4484192895SjamieSYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW, 4485192895Sjamie "I", "Jail cannot see all mounted file systems"); 4486231267SmmSYSCTL_JAIL_PARAM(, devfs_ruleset, CTLTYPE_INT | CTLFLAG_RW, 4487231267Smm "I", "Ruleset for in-jail devfs mounts"); 4488192895SjamieSYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, 4489192895Sjamie "B", "Jail persistence"); 4490194251Sjamie#ifdef VIMAGE 4491194251SjamieSYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN, 4492195870Sjamie "E,jailsys", "Virtual network stack"); 4493194251Sjamie#endif 4494192895SjamieSYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, 4495192895Sjamie "B", "Jail is in the process of shutting down"); 4496192895Sjamie 4497194762SjamieSYSCTL_JAIL_PARAM_NODE(children, "Number of child jails"); 4498194762SjamieSYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD, 4499194762Sjamie "I", "Current number of child jails"); 4500194762SjamieSYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW, 4501194762Sjamie "I", "Maximum number of child jails"); 4502194762Sjamie 4503195870SjamieSYSCTL_JAIL_PARAM_SYS_NODE(host, CTLFLAG_RW, "Jail host info"); 4504192895SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, 4505192895Sjamie "Jail hostname"); 4506193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN, 4507193066Sjamie "Jail NIS domainname"); 4508193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN, 4509193066Sjamie "Jail host UUID"); 4510193066SjamieSYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW, 4511193066Sjamie "LU", "Jail host ID"); 4512192895Sjamie 4513192895SjamieSYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset"); 4514192895SjamieSYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); 4515192895Sjamie 4516192895Sjamie#ifdef INET 4517195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip4, CTLFLAG_RDTUN, 4518195974Sjamie "Jail IPv4 address virtualization"); 4519192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), 4520192895Sjamie "S,in_addr,a", "Jail IPv4 addresses"); 4521202468SbzSYSCTL_JAIL_PARAM(_ip4, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4522202468Sbz "B", "Do (not) use IPv4 source address selection rather than the " 4523202468Sbz "primary jail IPv4 address."); 4524192895Sjamie#endif 4525192895Sjamie#ifdef INET6 4526195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip6, CTLFLAG_RDTUN, 4527195974Sjamie "Jail IPv6 address virtualization"); 4528192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), 4529192895Sjamie "S,in6_addr,a", "Jail IPv6 addresses"); 4530202468SbzSYSCTL_JAIL_PARAM(_ip6, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4531202468Sbz "B", "Do (not) use IPv6 source address selection rather than the " 4532202468Sbz "primary jail IPv6 address."); 4533192895Sjamie#endif 4534192895Sjamie 4535192895SjamieSYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags"); 4536192895SjamieSYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW, 4537192895Sjamie "B", "Jail may set hostname"); 4538192895SjamieSYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW, 4539192895Sjamie "B", "Jail may use SYSV IPC"); 4540192895SjamieSYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW, 4541192895Sjamie "B", "Jail may create raw sockets"); 4542192895SjamieSYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW, 4543192895Sjamie "B", "Jail may alter system file flags"); 4544192895SjamieSYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW, 4545192895Sjamie "B", "Jail may set file quotas"); 4546192895SjamieSYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW, 4547192895Sjamie "B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route"); 4548192895Sjamie 4549232059SmmSYSCTL_JAIL_PARAM_SUBNODE(allow, mount, "Jail mount/unmount permission flags"); 4550232059SmmSYSCTL_JAIL_PARAM(_allow_mount, , CTLTYPE_INT | CTLFLAG_RW, 4551232059Smm "B", "Jail may mount/unmount jail-friendly file systems in general"); 4552232059SmmSYSCTL_JAIL_PARAM(_allow_mount, devfs, CTLTYPE_INT | CTLFLAG_RW, 4553232186Smm "B", "Jail may mount the devfs file system"); 4554277985SjamieSYSCTL_JAIL_PARAM(_allow_mount, fdescfs, CTLTYPE_INT | CTLFLAG_RW, 4555277985Sjamie "B", "Jail may mount the fdescfs file system"); 4556232059SmmSYSCTL_JAIL_PARAM(_allow_mount, nullfs, CTLTYPE_INT | CTLFLAG_RW, 4557232186Smm "B", "Jail may mount the nullfs file system"); 4558232278SmmSYSCTL_JAIL_PARAM(_allow_mount, procfs, CTLTYPE_INT | CTLFLAG_RW, 4559232278Smm "B", "Jail may mount the procfs file system"); 4560295951SaraujoSYSCTL_JAIL_PARAM(_allow_mount, linprocfs, CTLTYPE_INT | CTLFLAG_RW, 4561295951Saraujo "B", "Jail may mount the linprocfs file system"); 4562295951SaraujoSYSCTL_JAIL_PARAM(_allow_mount, linsysfs, CTLTYPE_INT | CTLFLAG_RW, 4563295951Saraujo "B", "Jail may mount the linsysfs file system"); 4564254741SdelphijSYSCTL_JAIL_PARAM(_allow_mount, tmpfs, CTLTYPE_INT | CTLFLAG_RW, 4565254741Sdelphij "B", "Jail may mount the tmpfs file system"); 4566232186SmmSYSCTL_JAIL_PARAM(_allow_mount, zfs, CTLTYPE_INT | CTLFLAG_RW, 4567232186Smm "B", "Jail may mount the zfs file system"); 4568232059Smm 4569284665Strasz#ifdef RACCT 4570220137Straszvoid 4571220137Straszprison_racct_foreach(void (*callback)(struct racct *racct, 4572220137Strasz void *arg2, void *arg3), void *arg2, void *arg3) 4573220137Strasz{ 4574221362Strasz struct prison_racct *prr; 4575192895Sjamie 4576284665Strasz ASSERT_RACCT_ENABLED(); 4577284665Strasz 4578220137Strasz sx_slock(&allprison_lock); 4579221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) 4580221362Strasz (callback)(prr->prr_racct, arg2, arg3); 4581220137Strasz sx_sunlock(&allprison_lock); 4582220137Strasz} 4583220137Strasz 4584221362Straszstatic struct prison_racct * 4585221362Straszprison_racct_find_locked(const char *name) 4586221362Strasz{ 4587221362Strasz struct prison_racct *prr; 4588221362Strasz 4589284665Strasz ASSERT_RACCT_ENABLED(); 4590221362Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4591221362Strasz 4592221362Strasz if (name[0] == '\0' || strlen(name) >= MAXHOSTNAMELEN) 4593221362Strasz return (NULL); 4594221362Strasz 4595221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) { 4596221362Strasz if (strcmp(name, prr->prr_name) != 0) 4597221362Strasz continue; 4598221362Strasz 4599221362Strasz /* Found prison_racct with a matching name? */ 4600221362Strasz prison_racct_hold(prr); 4601221362Strasz return (prr); 4602221362Strasz } 4603221362Strasz 4604221362Strasz /* Add new prison_racct. */ 4605221362Strasz prr = malloc(sizeof(*prr), M_PRISON_RACCT, M_ZERO | M_WAITOK); 4606221362Strasz racct_create(&prr->prr_racct); 4607221362Strasz 4608221362Strasz strcpy(prr->prr_name, name); 4609221362Strasz refcount_init(&prr->prr_refcount, 1); 4610221362Strasz LIST_INSERT_HEAD(&allprison_racct, prr, prr_next); 4611221362Strasz 4612221362Strasz return (prr); 4613221362Strasz} 4614221362Strasz 4615221362Straszstruct prison_racct * 4616221362Straszprison_racct_find(const char *name) 4617221362Strasz{ 4618221362Strasz struct prison_racct *prr; 4619221362Strasz 4620284665Strasz ASSERT_RACCT_ENABLED(); 4621284665Strasz 4622221362Strasz sx_xlock(&allprison_lock); 4623221362Strasz prr = prison_racct_find_locked(name); 4624221362Strasz sx_xunlock(&allprison_lock); 4625221362Strasz return (prr); 4626221362Strasz} 4627221362Strasz 4628221362Straszvoid 4629221362Straszprison_racct_hold(struct prison_racct *prr) 4630221362Strasz{ 4631221362Strasz 4632284665Strasz ASSERT_RACCT_ENABLED(); 4633284665Strasz 4634221362Strasz refcount_acquire(&prr->prr_refcount); 4635221362Strasz} 4636221362Strasz 4637232598Straszstatic void 4638232598Straszprison_racct_free_locked(struct prison_racct *prr) 4639232598Strasz{ 4640232598Strasz 4641284665Strasz ASSERT_RACCT_ENABLED(); 4642232598Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4643232598Strasz 4644232598Strasz if (refcount_release(&prr->prr_refcount)) { 4645232598Strasz racct_destroy(&prr->prr_racct); 4646232598Strasz LIST_REMOVE(prr, prr_next); 4647232598Strasz free(prr, M_PRISON_RACCT); 4648232598Strasz } 4649232598Strasz} 4650232598Strasz 4651221362Straszvoid 4652221362Straszprison_racct_free(struct prison_racct *prr) 4653221362Strasz{ 4654221362Strasz int old; 4655221362Strasz 4656284665Strasz ASSERT_RACCT_ENABLED(); 4657232598Strasz sx_assert(&allprison_lock, SA_UNLOCKED); 4658232598Strasz 4659221362Strasz old = prr->prr_refcount; 4660221362Strasz if (old > 1 && atomic_cmpset_int(&prr->prr_refcount, old, old - 1)) 4661221362Strasz return; 4662221362Strasz 4663221362Strasz sx_xlock(&allprison_lock); 4664232598Strasz prison_racct_free_locked(prr); 4665221362Strasz sx_xunlock(&allprison_lock); 4666221362Strasz} 4667221362Strasz 4668221362Straszstatic void 4669221362Straszprison_racct_attach(struct prison *pr) 4670221362Strasz{ 4671221362Strasz struct prison_racct *prr; 4672221362Strasz 4673284665Strasz ASSERT_RACCT_ENABLED(); 4674232598Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4675232598Strasz 4676221362Strasz prr = prison_racct_find_locked(pr->pr_name); 4677221362Strasz KASSERT(prr != NULL, ("cannot find prison_racct")); 4678221362Strasz 4679221362Strasz pr->pr_prison_racct = prr; 4680221362Strasz} 4681221362Strasz 4682232598Strasz/* 4683232598Strasz * Handle jail renaming. From the racct point of view, renaming means 4684232598Strasz * moving from one prison_racct to another. 4685232598Strasz */ 4686221362Straszstatic void 4687232598Straszprison_racct_modify(struct prison *pr) 4688232598Strasz{ 4689232598Strasz struct proc *p; 4690232598Strasz struct ucred *cred; 4691232598Strasz struct prison_racct *oldprr; 4692232598Strasz 4693284665Strasz ASSERT_RACCT_ENABLED(); 4694284665Strasz 4695232598Strasz sx_slock(&allproc_lock); 4696232598Strasz sx_xlock(&allprison_lock); 4697232598Strasz 4698235795Strasz if (strcmp(pr->pr_name, pr->pr_prison_racct->prr_name) == 0) { 4699235795Strasz sx_xunlock(&allprison_lock); 4700235795Strasz sx_sunlock(&allproc_lock); 4701232598Strasz return; 4702235795Strasz } 4703232598Strasz 4704232598Strasz oldprr = pr->pr_prison_racct; 4705232598Strasz pr->pr_prison_racct = NULL; 4706232598Strasz 4707232598Strasz prison_racct_attach(pr); 4708232598Strasz 4709232598Strasz /* 4710232598Strasz * Move resource utilisation records. 4711232598Strasz */ 4712232598Strasz racct_move(pr->pr_prison_racct->prr_racct, oldprr->prr_racct); 4713232598Strasz 4714232598Strasz /* 4715232598Strasz * Force rctl to reattach rules to processes. 4716232598Strasz */ 4717232598Strasz FOREACH_PROC_IN_SYSTEM(p) { 4718232598Strasz PROC_LOCK(p); 4719232598Strasz cred = crhold(p->p_ucred); 4720232598Strasz PROC_UNLOCK(p); 4721232598Strasz racct_proc_ucred_changed(p, cred, cred); 4722232598Strasz crfree(cred); 4723232598Strasz } 4724232598Strasz 4725232598Strasz sx_sunlock(&allproc_lock); 4726232598Strasz prison_racct_free_locked(oldprr); 4727232598Strasz sx_xunlock(&allprison_lock); 4728232598Strasz} 4729232598Strasz 4730232598Straszstatic void 4731221362Straszprison_racct_detach(struct prison *pr) 4732221362Strasz{ 4733232598Strasz 4734284665Strasz ASSERT_RACCT_ENABLED(); 4735232598Strasz sx_assert(&allprison_lock, SA_UNLOCKED); 4736232598Strasz 4737244404Smjg if (pr->pr_prison_racct == NULL) 4738244404Smjg return; 4739221362Strasz prison_racct_free(pr->pr_prison_racct); 4740221362Strasz pr->pr_prison_racct = NULL; 4741221362Strasz} 4742221362Strasz#endif /* RACCT */ 4743221362Strasz 4744185435Sbz#ifdef DDB 4745191673Sjamie 4746191673Sjamiestatic void 4747191673Sjamiedb_show_prison(struct prison *pr) 4748185435Sbz{ 4749192895Sjamie int fi; 4750191673Sjamie#if defined(INET) || defined(INET6) 4751191673Sjamie int ii; 4752185435Sbz#endif 4753195870Sjamie unsigned jsf; 4754185435Sbz#ifdef INET6 4755185435Sbz char ip6buf[INET6_ADDRSTRLEN]; 4756185435Sbz#endif 4757185435Sbz 4758191673Sjamie db_printf("prison %p:\n", pr); 4759191673Sjamie db_printf(" jid = %d\n", pr->pr_id); 4760191673Sjamie db_printf(" name = %s\n", pr->pr_name); 4761192895Sjamie db_printf(" parent = %p\n", pr->pr_parent); 4762191673Sjamie db_printf(" ref = %d\n", pr->pr_ref); 4763191673Sjamie db_printf(" uref = %d\n", pr->pr_uref); 4764191673Sjamie db_printf(" path = %s\n", pr->pr_path); 4765191673Sjamie db_printf(" cpuset = %d\n", pr->pr_cpuset 4766191673Sjamie ? pr->pr_cpuset->cs_id : -1); 4767194251Sjamie#ifdef VIMAGE 4768194251Sjamie db_printf(" vnet = %p\n", pr->pr_vnet); 4769194251Sjamie#endif 4770191673Sjamie db_printf(" root = %p\n", pr->pr_root); 4771191673Sjamie db_printf(" securelevel = %d\n", pr->pr_securelevel); 4772231267Smm db_printf(" devfs_rsnum = %d\n", pr->pr_devfs_rsnum); 4773202123Sbz db_printf(" children.max = %d\n", pr->pr_childmax); 4774202123Sbz db_printf(" children.cur = %d\n", pr->pr_childcount); 4775192895Sjamie db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children)); 4776192895Sjamie db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling)); 4777202123Sbz db_printf(" flags = 0x%x", pr->pr_flags); 4778192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 4779192895Sjamie fi++) 4780192895Sjamie if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi))) 4781192895Sjamie db_printf(" %s", pr_flag_names[fi]); 4782195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 4783195870Sjamie fi++) { 4784195870Sjamie jsf = pr->pr_flags & 4785195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 4786195870Sjamie db_printf(" %-16s= %s\n", pr_flag_jailsys[fi].name, 4787195870Sjamie pr_flag_jailsys[fi].disable && 4788195870Sjamie (jsf == pr_flag_jailsys[fi].disable) ? "disable" 4789195870Sjamie : (jsf == pr_flag_jailsys[fi].new) ? "new" 4790195870Sjamie : "inherit"); 4791195870Sjamie } 4792202123Sbz db_printf(" allow = 0x%x", pr->pr_allow); 4793192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 4794192895Sjamie fi++) 4795192895Sjamie if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi))) 4796192895Sjamie db_printf(" %s", pr_allow_names[fi]); 4797191673Sjamie db_printf("\n"); 4798192895Sjamie db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs); 4799194118Sjamie db_printf(" host.hostname = %s\n", pr->pr_hostname); 4800194118Sjamie db_printf(" host.domainname = %s\n", pr->pr_domainname); 4801194118Sjamie db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid); 4802193066Sjamie db_printf(" host.hostid = %lu\n", pr->pr_hostid); 4803185435Sbz#ifdef INET 4804191673Sjamie db_printf(" ip4s = %d\n", pr->pr_ip4s); 4805191673Sjamie for (ii = 0; ii < pr->pr_ip4s; ii++) 4806191673Sjamie db_printf(" %s %s\n", 4807202123Sbz ii == 0 ? "ip4.addr =" : " ", 4808191673Sjamie inet_ntoa(pr->pr_ip4[ii])); 4809185435Sbz#endif 4810185435Sbz#ifdef INET6 4811191673Sjamie db_printf(" ip6s = %d\n", pr->pr_ip6s); 4812191673Sjamie for (ii = 0; ii < pr->pr_ip6s; ii++) 4813191673Sjamie db_printf(" %s %s\n", 4814202123Sbz ii == 0 ? "ip6.addr =" : " ", 4815191673Sjamie ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); 4816191673Sjamie#endif 4817191673Sjamie} 4818191673Sjamie 4819191673SjamieDB_SHOW_COMMAND(prison, db_show_prison_command) 4820191673Sjamie{ 4821191673Sjamie struct prison *pr; 4822191673Sjamie 4823191673Sjamie if (!have_addr) { 4824192895Sjamie /* 4825192895Sjamie * Show all prisons in the list, and prison0 which is not 4826192895Sjamie * listed. 4827192895Sjamie */ 4828192895Sjamie db_show_prison(&prison0); 4829192895Sjamie if (!db_pager_quit) { 4830192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 4831192895Sjamie db_show_prison(pr); 4832192895Sjamie if (db_pager_quit) 4833192895Sjamie break; 4834192895Sjamie } 4835191673Sjamie } 4836191673Sjamie return; 4837191673Sjamie } 4838191673Sjamie 4839192895Sjamie if (addr == 0) 4840192895Sjamie pr = &prison0; 4841192895Sjamie else { 4842192895Sjamie /* Look for a prison with the ID and with references. */ 4843191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4844192895Sjamie if (pr->pr_id == addr && pr->pr_ref > 0) 4845191673Sjamie break; 4846192895Sjamie if (pr == NULL) 4847192895Sjamie /* Look again, without requiring a reference. */ 4848192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4849192895Sjamie if (pr->pr_id == addr) 4850192895Sjamie break; 4851192895Sjamie if (pr == NULL) 4852192895Sjamie /* Assume address points to a valid prison. */ 4853192895Sjamie pr = (struct prison *)addr; 4854192895Sjamie } 4855191673Sjamie db_show_prison(pr); 4856185435Sbz} 4857191673Sjamie 4858185435Sbz#endif /* DDB */ 4859