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 339410 2018-10-17 16:17:56Z 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 935301909Sjamie error = vfs_getopt(opts, "osrelease", (void **)&osrelstr, &len); 936301909Sjamie if (error == ENOENT) 937301909Sjamie osrelstr = NULL; 938301909Sjamie else if (error != 0) 939301909Sjamie goto done_free; 940301909Sjamie else { 941301909Sjamie if (flags & JAIL_UPDATE) { 942301909Sjamie error = EINVAL; 943301909Sjamie vfs_opterror(opts, 944301909Sjamie "osrelease cannot be changed after creation"); 945301909Sjamie goto done_errmsg; 946301909Sjamie } 947301909Sjamie if (len == 0 || len >= OSRELEASELEN) { 948301909Sjamie error = EINVAL; 949301909Sjamie vfs_opterror(opts, 950301909Sjamie "osrelease string must be 1-%d bytes long", 951301909Sjamie OSRELEASELEN - 1); 952301909Sjamie goto done_errmsg; 953301909Sjamie } 954301909Sjamie } 955301909Sjamie 956301909Sjamie error = vfs_copyopt(opts, "osreldate", &osreldt, sizeof(osreldt)); 957301909Sjamie if (error == ENOENT) 958301909Sjamie osreldt = 0; 959301909Sjamie else if (error != 0) 960301909Sjamie goto done_free; 961301909Sjamie else { 962301909Sjamie if (flags & JAIL_UPDATE) { 963301909Sjamie error = EINVAL; 964301909Sjamie vfs_opterror(opts, 965301909Sjamie "osreldate cannot be changed after creation"); 966301909Sjamie goto done_errmsg; 967301909Sjamie } 968301909Sjamie if (osreldt == 0) { 969301909Sjamie error = EINVAL; 970301909Sjamie vfs_opterror(opts, "osreldate cannot be 0"); 971301909Sjamie goto done_errmsg; 972301909Sjamie } 973301909Sjamie } 974301909Sjamie 975230143Smm fullpath_disabled = 0; 976191673Sjamie root = NULL; 977191673Sjamie error = vfs_getopt(opts, "path", (void **)&path, &len); 978191673Sjamie if (error == ENOENT) 979191673Sjamie path = NULL; 980191673Sjamie else if (error != 0) 981191673Sjamie goto done_free; 982191673Sjamie else { 983191673Sjamie if (flags & JAIL_UPDATE) { 984191673Sjamie error = EINVAL; 985191673Sjamie vfs_opterror(opts, 986191673Sjamie "path cannot be changed after creation"); 987191673Sjamie goto done_errmsg; 988191673Sjamie } 989191673Sjamie if (len == 0 || path[len - 1] != '\0') { 990191673Sjamie error = EINVAL; 991191673Sjamie goto done_free; 992191673Sjamie } 993241896Skib NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, 994230129Smm path, td); 995230129Smm error = namei(&nd); 996230129Smm if (error) 997230129Smm goto done_free; 998230129Smm root = nd.ni_vp; 999230129Smm NDFREE(&nd, NDF_ONLY_PNBUF); 1000230407Smm g_path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 1001230407Smm strlcpy(g_path, path, MAXPATHLEN); 1002230407Smm error = vn_path_to_global_path(td, root, g_path, MAXPATHLEN); 1003230407Smm if (error == 0) 1004230407Smm path = g_path; 1005230407Smm else if (error == ENODEV) { 1006230129Smm /* proceed if sysctl debug.disablefullpath == 1 */ 1007230129Smm fullpath_disabled = 1; 1008230129Smm if (len < 2 || (len == 2 && path[0] == '/')) 1009230129Smm path = NULL; 1010230407Smm } else { 1011230129Smm /* exit on other errors */ 1012230129Smm goto done_free; 1013230129Smm } 1014230129Smm if (root->v_type != VDIR) { 1015230129Smm error = ENOTDIR; 1016230129Smm vput(root); 1017230129Smm goto done_free; 1018230129Smm } 1019230129Smm VOP_UNLOCK(root, 0); 1020230129Smm if (fullpath_disabled) { 1021192895Sjamie /* Leave room for a real-root full pathname. */ 1022192895Sjamie if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/") 1023192895Sjamie ? strlen(mypr->pr_path) : 0) > MAXPATHLEN) { 1024192895Sjamie error = ENAMETOOLONG; 1025301910Sjamie vrele(root); 1026192895Sjamie goto done_free; 1027192895Sjamie } 1028191673Sjamie } 1029191673Sjamie } 1030185435Sbz 1031191673Sjamie /* 1032298833Sjamie * Find the specified jail, or at least its parent. 1033191673Sjamie * This abuses the file error codes ENOENT and EEXIST. 1034185435Sbz */ 1035191673Sjamie pr = NULL; 1036298833Sjamie ppr = mypr; 1037196835Sjamie if (cuflags == JAIL_CREATE && jid == 0 && name != NULL) { 1038196835Sjamie namelc = strrchr(name, '.'); 1039196835Sjamie jid = strtoul(namelc != NULL ? namelc + 1 : name, &p, 10); 1040196835Sjamie if (*p != '\0') 1041196835Sjamie jid = 0; 1042196835Sjamie } 1043298833Sjamie sx_xlock(&allprison_lock); 1044191673Sjamie if (jid != 0) { 1045192895Sjamie /* 1046192895Sjamie * See if a requested jid already exists. There is an 1047192895Sjamie * information leak here if the jid exists but is not within 1048192895Sjamie * the caller's jail hierarchy. Jail creators will get EEXIST 1049192895Sjamie * even though they cannot see the jail, and CREATE | UPDATE 1050192895Sjamie * will return ENOENT which is not normally a valid error. 1051192895Sjamie */ 1052191673Sjamie if (jid < 0) { 1053191673Sjamie error = EINVAL; 1054191673Sjamie vfs_opterror(opts, "negative jid"); 1055191673Sjamie goto done_unlock_list; 1056191673Sjamie } 1057191673Sjamie pr = prison_find(jid); 1058191673Sjamie if (pr != NULL) { 1059192895Sjamie ppr = pr->pr_parent; 1060191673Sjamie /* Create: jid must not exist. */ 1061191673Sjamie if (cuflags == JAIL_CREATE) { 1062191673Sjamie mtx_unlock(&pr->pr_mtx); 1063191673Sjamie error = EEXIST; 1064191673Sjamie vfs_opterror(opts, "jail %d already exists", 1065191673Sjamie jid); 1066191673Sjamie goto done_unlock_list; 1067191673Sjamie } 1068192895Sjamie if (!prison_ischild(mypr, pr)) { 1069192895Sjamie mtx_unlock(&pr->pr_mtx); 1070192895Sjamie pr = NULL; 1071192895Sjamie } else if (pr->pr_uref == 0) { 1072191673Sjamie if (!(flags & JAIL_DYING)) { 1073191673Sjamie mtx_unlock(&pr->pr_mtx); 1074191673Sjamie error = ENOENT; 1075191673Sjamie vfs_opterror(opts, "jail %d is dying", 1076191673Sjamie jid); 1077191673Sjamie goto done_unlock_list; 1078191673Sjamie } else if ((flags & JAIL_ATTACH) || 1079191673Sjamie (pr_flags & PR_PERSIST)) { 1080191673Sjamie /* 1081191673Sjamie * A dying jail might be resurrected 1082191673Sjamie * (via attach or persist), but first 1083191673Sjamie * it must determine if another jail 1084191673Sjamie * has claimed its name. Accomplish 1085191673Sjamie * this by implicitly re-setting the 1086191673Sjamie * name. 1087191673Sjamie */ 1088191673Sjamie if (name == NULL) 1089192895Sjamie name = prison_name(mypr, pr); 1090191673Sjamie } 1091191673Sjamie } 1092191673Sjamie } 1093191673Sjamie if (pr == NULL) { 1094191673Sjamie /* Update: jid must exist. */ 1095191673Sjamie if (cuflags == JAIL_UPDATE) { 1096191673Sjamie error = ENOENT; 1097191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 1098191673Sjamie goto done_unlock_list; 1099191673Sjamie } 1100191673Sjamie } 1101191673Sjamie } 1102191673Sjamie /* 1103191673Sjamie * If the caller provided a name, look for a jail by that name. 1104191673Sjamie * This has different semantics for creates and updates keyed by jid 1105191673Sjamie * (where the name must not already exist in a different jail), 1106191673Sjamie * and updates keyed by the name itself (where the name must exist 1107191673Sjamie * because that is the jail being updated). 1108191673Sjamie */ 1109298833Sjamie namelc = NULL; 1110191673Sjamie if (name != NULL) { 1111196835Sjamie namelc = strrchr(name, '.'); 1112196835Sjamie if (namelc == NULL) 1113196835Sjamie namelc = name; 1114196835Sjamie else { 1115192895Sjamie /* 1116192895Sjamie * This is a hierarchical name. Split it into the 1117192895Sjamie * parent and child names, and make sure the parent 1118192895Sjamie * exists or matches an already found jail. 1119192895Sjamie */ 1120192895Sjamie if (pr != NULL) { 1121196835Sjamie if (strncmp(name, ppr->pr_name, namelc - name) 1122196835Sjamie || ppr->pr_name[namelc - name] != '\0') { 1123192895Sjamie mtx_unlock(&pr->pr_mtx); 1124192895Sjamie error = EINVAL; 1125192895Sjamie vfs_opterror(opts, 1126192895Sjamie "cannot change jail's parent"); 1127192895Sjamie goto done_unlock_list; 1128192895Sjamie } 1129192895Sjamie } else { 1130298833Sjamie *namelc = '\0'; 1131192895Sjamie ppr = prison_find_name(mypr, name); 1132192895Sjamie if (ppr == NULL) { 1133192895Sjamie error = ENOENT; 1134192895Sjamie vfs_opterror(opts, 1135192895Sjamie "jail \"%s\" not found", name); 1136192895Sjamie goto done_unlock_list; 1137192895Sjamie } 1138192895Sjamie mtx_unlock(&ppr->pr_mtx); 1139298833Sjamie *namelc = '.'; 1140192895Sjamie } 1141298833Sjamie namelc++; 1142192895Sjamie } 1143298833Sjamie if (namelc[0] != '\0') { 1144298833Sjamie pnamelen = 1145192895Sjamie (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1146192895Sjamie name_again: 1147191673Sjamie deadpr = NULL; 1148192895Sjamie FOREACH_PRISON_CHILD(ppr, tpr) { 1149191673Sjamie if (tpr != pr && tpr->pr_ref > 0 && 1150298833Sjamie !strcmp(tpr->pr_name + pnamelen, namelc)) { 1151191673Sjamie if (pr == NULL && 1152191673Sjamie cuflags != JAIL_CREATE) { 1153191673Sjamie mtx_lock(&tpr->pr_mtx); 1154191673Sjamie if (tpr->pr_ref > 0) { 1155191673Sjamie /* 1156191673Sjamie * Use this jail 1157191673Sjamie * for updates. 1158191673Sjamie */ 1159191673Sjamie if (tpr->pr_uref > 0) { 1160191673Sjamie pr = tpr; 1161191673Sjamie break; 1162191673Sjamie } 1163191673Sjamie deadpr = tpr; 1164191673Sjamie } 1165191673Sjamie mtx_unlock(&tpr->pr_mtx); 1166191673Sjamie } else if (tpr->pr_uref > 0) { 1167191673Sjamie /* 1168191673Sjamie * Create, or update(jid): 1169191673Sjamie * name must not exist in an 1170192895Sjamie * active sibling jail. 1171191673Sjamie */ 1172191673Sjamie error = EEXIST; 1173191673Sjamie if (pr != NULL) 1174191673Sjamie mtx_unlock(&pr->pr_mtx); 1175191673Sjamie vfs_opterror(opts, 1176191673Sjamie "jail \"%s\" already exists", 1177191673Sjamie name); 1178191673Sjamie goto done_unlock_list; 1179191673Sjamie } 1180191673Sjamie } 1181191673Sjamie } 1182191673Sjamie /* If no active jail is found, use a dying one. */ 1183191673Sjamie if (deadpr != NULL && pr == NULL) { 1184191673Sjamie if (flags & JAIL_DYING) { 1185191673Sjamie mtx_lock(&deadpr->pr_mtx); 1186191673Sjamie if (deadpr->pr_ref == 0) { 1187191673Sjamie mtx_unlock(&deadpr->pr_mtx); 1188191673Sjamie goto name_again; 1189191673Sjamie } 1190191673Sjamie pr = deadpr; 1191191673Sjamie } else if (cuflags == JAIL_UPDATE) { 1192191673Sjamie error = ENOENT; 1193191673Sjamie vfs_opterror(opts, 1194191673Sjamie "jail \"%s\" is dying", name); 1195191673Sjamie goto done_unlock_list; 1196191673Sjamie } 1197191673Sjamie } 1198191673Sjamie /* Update: name must exist if no jid. */ 1199191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1200191673Sjamie error = ENOENT; 1201191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1202191673Sjamie name); 1203191673Sjamie goto done_unlock_list; 1204191673Sjamie } 1205191673Sjamie } 1206191673Sjamie } 1207191673Sjamie /* Update: must provide a jid or name. */ 1208191673Sjamie else if (cuflags == JAIL_UPDATE && pr == NULL) { 1209191673Sjamie error = ENOENT; 1210191673Sjamie vfs_opterror(opts, "update specified no jail"); 1211191673Sjamie goto done_unlock_list; 1212191673Sjamie } 1213185435Sbz 1214191673Sjamie /* If there's no prison to update, create a new one and link it in. */ 1215191673Sjamie if (pr == NULL) { 1216194762Sjamie for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent) 1217194762Sjamie if (tpr->pr_childcount >= tpr->pr_childmax) { 1218194762Sjamie error = EPERM; 1219194762Sjamie vfs_opterror(opts, "prison limit exceeded"); 1220194762Sjamie goto done_unlock_list; 1221194762Sjamie } 1222191673Sjamie created = 1; 1223192895Sjamie mtx_lock(&ppr->pr_mtx); 1224298832Sjamie if (ppr->pr_ref == 0) { 1225192895Sjamie mtx_unlock(&ppr->pr_mtx); 1226192895Sjamie error = ENOENT; 1227298833Sjamie vfs_opterror(opts, "jail \"%s\" not found", 1228298833Sjamie prison_name(mypr, ppr)); 1229192895Sjamie goto done_unlock_list; 1230192895Sjamie } 1231192895Sjamie ppr->pr_ref++; 1232192895Sjamie ppr->pr_uref++; 1233192895Sjamie mtx_unlock(&ppr->pr_mtx); 1234191673Sjamie pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO); 1235191673Sjamie if (jid == 0) { 1236191673Sjamie /* Find the next free jid. */ 1237191673Sjamie jid = lastprid + 1; 1238191673Sjamie findnext: 1239191673Sjamie if (jid == JAIL_MAX) 1240191673Sjamie jid = 1; 1241191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) { 1242191673Sjamie if (tpr->pr_id < jid) 1243191673Sjamie continue; 1244191673Sjamie if (tpr->pr_id > jid || tpr->pr_ref == 0) { 1245191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1246191673Sjamie break; 1247191673Sjamie } 1248191673Sjamie if (jid == lastprid) { 1249191673Sjamie error = EAGAIN; 1250191673Sjamie vfs_opterror(opts, 1251191673Sjamie "no available jail IDs"); 1252191673Sjamie free(pr, M_PRISON); 1253192895Sjamie prison_deref(ppr, PD_DEREF | 1254192895Sjamie PD_DEUREF | PD_LIST_XLOCKED); 1255192895Sjamie goto done_releroot; 1256191673Sjamie } 1257191673Sjamie jid++; 1258191673Sjamie goto findnext; 1259191673Sjamie } 1260191673Sjamie lastprid = jid; 1261191673Sjamie } else { 1262191673Sjamie /* 1263191673Sjamie * The jail already has a jid (that did not yet exist), 1264191673Sjamie * so just find where to insert it. 1265191673Sjamie */ 1266191673Sjamie TAILQ_FOREACH(tpr, &allprison, pr_list) 1267191673Sjamie if (tpr->pr_id >= jid) { 1268191673Sjamie TAILQ_INSERT_BEFORE(tpr, pr, pr_list); 1269191673Sjamie break; 1270191673Sjamie } 1271191673Sjamie } 1272191673Sjamie if (tpr == NULL) 1273191673Sjamie TAILQ_INSERT_TAIL(&allprison, pr, pr_list); 1274192895Sjamie LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling); 1275192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 1276194762Sjamie tpr->pr_childcount++; 1277185435Sbz 1278192895Sjamie pr->pr_parent = ppr; 1279191673Sjamie pr->pr_id = jid; 1280192895Sjamie 1281192895Sjamie /* Set some default values, and inherit some from the parent. */ 1282298833Sjamie if (namelc == NULL) 1283298833Sjamie namelc = ""; 1284191673Sjamie if (path == NULL) { 1285191673Sjamie path = "/"; 1286192895Sjamie root = mypr->pr_root; 1287191673Sjamie vref(root); 1288191673Sjamie } 1289195944Sjamie strlcpy(pr->pr_hostuuid, DEFAULT_HOSTUUID, HOSTUUIDLEN); 1290195944Sjamie pr->pr_flags |= PR_HOST; 1291195945Sjamie#if defined(INET) || defined(INET6) 1292195945Sjamie#ifdef VIMAGE 1293195945Sjamie if (!(pr_flags & PR_VNET)) 1294195945Sjamie#endif 1295195945Sjamie { 1296192895Sjamie#ifdef INET 1297195974Sjamie if (!(ch_flags & PR_IP4_USER)) 1298195974Sjamie pr->pr_flags |= 1299195974Sjamie PR_IP4 | PR_IP4_USER | PR_IP4_DISABLE; 1300195974Sjamie else if (!(pr_flags & PR_IP4_USER)) { 1301195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP4; 1302195974Sjamie if (ppr->pr_ip4 != NULL) { 1303195974Sjamie pr->pr_ip4s = ppr->pr_ip4s; 1304195974Sjamie pr->pr_ip4 = malloc(pr->pr_ip4s * 1305195974Sjamie sizeof(struct in_addr), M_PRISON, 1306195974Sjamie M_WAITOK); 1307195974Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 1308195974Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 1309195974Sjamie } 1310195974Sjamie } 1311192895Sjamie#endif 1312192895Sjamie#ifdef INET6 1313195974Sjamie if (!(ch_flags & PR_IP6_USER)) 1314195974Sjamie pr->pr_flags |= 1315195974Sjamie PR_IP6 | PR_IP6_USER | PR_IP6_DISABLE; 1316195974Sjamie else if (!(pr_flags & PR_IP6_USER)) { 1317195974Sjamie pr->pr_flags |= ppr->pr_flags & PR_IP6; 1318195974Sjamie if (ppr->pr_ip6 != NULL) { 1319195974Sjamie pr->pr_ip6s = ppr->pr_ip6s; 1320195974Sjamie pr->pr_ip6 = malloc(pr->pr_ip6s * 1321195974Sjamie sizeof(struct in6_addr), M_PRISON, 1322195974Sjamie M_WAITOK); 1323195974Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 1324195974Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 1325195974Sjamie } 1326195974Sjamie } 1327192895Sjamie#endif 1328195945Sjamie } 1329195945Sjamie#endif 1330202468Sbz /* Source address selection is always on by default. */ 1331202468Sbz pr->pr_flags |= _PR_IP_SADDRSEL; 1332202468Sbz 1333192895Sjamie pr->pr_securelevel = ppr->pr_securelevel; 1334192895Sjamie pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow; 1335196002Sjamie pr->pr_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS; 1336232059Smm pr->pr_devfs_rsnum = ppr->pr_devfs_rsnum; 1337191673Sjamie 1338280632Sian pr->pr_osreldate = osreldt ? osreldt : ppr->pr_osreldate; 1339280632Sian if (osrelstr == NULL) 1340280632Sian strcpy(pr->pr_osrelease, ppr->pr_osrelease); 1341280632Sian else 1342280632Sian strcpy(pr->pr_osrelease, osrelstr); 1343280632Sian 1344192895Sjamie LIST_INIT(&pr->pr_children); 1345192895Sjamie mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK); 1346298833Sjamie TASK_INIT(&pr->pr_task, 0, prison_complete, pr); 1347191673Sjamie 1348194251Sjamie#ifdef VIMAGE 1349194251Sjamie /* Allocate a new vnet if specified. */ 1350194251Sjamie pr->pr_vnet = (pr_flags & PR_VNET) 1351194251Sjamie ? vnet_alloc() : ppr->pr_vnet; 1352194251Sjamie#endif 1353185435Sbz /* 1354191673Sjamie * Allocate a dedicated cpuset for each jail. 1355191673Sjamie * Unlike other initial settings, this may return an erorr. 1356185435Sbz */ 1357192895Sjamie error = cpuset_create_root(ppr, &pr->pr_cpuset); 1358191673Sjamie if (error) { 1359191673Sjamie prison_deref(pr, PD_LIST_XLOCKED); 1360191673Sjamie goto done_releroot; 1361191673Sjamie } 1362185435Sbz 1363191673Sjamie mtx_lock(&pr->pr_mtx); 1364185435Sbz /* 1365191673Sjamie * New prisons do not yet have a reference, because we do not 1366298833Sjamie * want others to see the incomplete prison once the 1367191673Sjamie * allprison_lock is downgraded. 1368185435Sbz */ 1369191673Sjamie } else { 1370191673Sjamie created = 0; 1371195974Sjamie /* 1372195974Sjamie * Grab a reference for existing prisons, to ensure they 1373195974Sjamie * continue to exist for the duration of the call. 1374195974Sjamie */ 1375195974Sjamie pr->pr_ref++; 1376195945Sjamie#if defined(VIMAGE) && (defined(INET) || defined(INET6)) 1377195945Sjamie if ((pr->pr_flags & PR_VNET) && 1378195945Sjamie (ch_flags & (PR_IP4_USER | PR_IP6_USER))) { 1379195945Sjamie error = EINVAL; 1380195945Sjamie vfs_opterror(opts, 1381195945Sjamie "vnet jails cannot have IP address restrictions"); 1382195945Sjamie goto done_deref_locked; 1383195945Sjamie } 1384195945Sjamie#endif 1385195974Sjamie#ifdef INET 1386195974Sjamie if (PR_IP4_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1387195974Sjamie error = EINVAL; 1388195974Sjamie vfs_opterror(opts, 1389195974Sjamie "ip4 cannot be changed after creation"); 1390195974Sjamie goto done_deref_locked; 1391195974Sjamie } 1392195974Sjamie#endif 1393195974Sjamie#ifdef INET6 1394195974Sjamie if (PR_IP6_USER & ch_flags & (pr_flags ^ pr->pr_flags)) { 1395195974Sjamie error = EINVAL; 1396195974Sjamie vfs_opterror(opts, 1397195974Sjamie "ip6 cannot be changed after creation"); 1398195974Sjamie goto done_deref_locked; 1399195974Sjamie } 1400195974Sjamie#endif 1401191673Sjamie } 1402185435Sbz 1403191673Sjamie /* Do final error checking before setting anything. */ 1404192895Sjamie if (gotslevel) { 1405192895Sjamie if (slevel < ppr->pr_securelevel) { 1406192895Sjamie error = EPERM; 1407192895Sjamie goto done_deref_locked; 1408192895Sjamie } 1409192895Sjamie } 1410194762Sjamie if (gotchildmax) { 1411194762Sjamie if (childmax >= ppr->pr_childmax) { 1412194762Sjamie error = EPERM; 1413194762Sjamie goto done_deref_locked; 1414194762Sjamie } 1415194762Sjamie } 1416192895Sjamie if (gotenforce) { 1417192895Sjamie if (enforce < ppr->pr_enforce_statfs) { 1418192895Sjamie error = EPERM; 1419192895Sjamie goto done_deref_locked; 1420192895Sjamie } 1421192895Sjamie } 1422231267Smm if (gotrsnum) { 1423231267Smm /* 1424231267Smm * devfs_rsnum is a uint16_t 1425231267Smm */ 1426232059Smm if (rsnum < 0 || rsnum > 65535) { 1427231267Smm error = EINVAL; 1428231267Smm goto done_deref_locked; 1429231267Smm } 1430231267Smm /* 1431232059Smm * Nested jails always inherit parent's devfs ruleset 1432231267Smm */ 1433231267Smm if (jailed(td->td_ucred)) { 1434231267Smm if (rsnum > 0 && rsnum != ppr->pr_devfs_rsnum) { 1435231267Smm error = EPERM; 1436231267Smm goto done_deref_locked; 1437232059Smm } else 1438231267Smm rsnum = ppr->pr_devfs_rsnum; 1439231267Smm } 1440231267Smm } 1441185435Sbz#ifdef INET 1442195974Sjamie if (ip4s > 0) { 1443192895Sjamie if (ppr->pr_flags & PR_IP4) { 1444195974Sjamie /* 1445195974Sjamie * Make sure the new set of IP addresses is a 1446195974Sjamie * subset of the parent's list. Don't worry 1447195974Sjamie * about the parent being unlocked, as any 1448195974Sjamie * setting is done with allprison_lock held. 1449195974Sjamie */ 1450195974Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 1451195974Sjamie if (ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 1452195974Sjamie break; 1453195974Sjamie if (ij == ppr->pr_ip4s) { 1454195974Sjamie error = EPERM; 1455195974Sjamie goto done_deref_locked; 1456195974Sjamie } 1457195974Sjamie if (ip4s > 1) { 1458195974Sjamie for (ii = ij = 1; ii < ip4s; ii++) { 1459195974Sjamie if (ip4[ii].s_addr == 1460195974Sjamie ppr->pr_ip4[0].s_addr) 1461195974Sjamie continue; 1462195974Sjamie for (; ij < ppr->pr_ip4s; ij++) 1463195974Sjamie if (ip4[ii].s_addr == 1464195974Sjamie ppr->pr_ip4[ij].s_addr) 1465195974Sjamie break; 1466195974Sjamie if (ij == ppr->pr_ip4s) 1467195974Sjamie break; 1468192895Sjamie } 1469192895Sjamie if (ij == ppr->pr_ip4s) { 1470192895Sjamie error = EPERM; 1471192895Sjamie goto done_deref_locked; 1472192895Sjamie } 1473192895Sjamie } 1474192895Sjamie } 1475195974Sjamie /* 1476195974Sjamie * Check for conflicting IP addresses. We permit them 1477195974Sjamie * if there is no more than one IP on each jail. If 1478195974Sjamie * there is a duplicate on a jail with more than one 1479195974Sjamie * IP stop checking and return error. 1480195974Sjamie */ 1481195945Sjamie#ifdef VIMAGE 1482339410Sjamie for (tppr = ppr; tppr != &prison0; tppr = tppr->pr_parent) 1483195974Sjamie if (tppr->pr_flags & PR_VNET) 1484195974Sjamie break; 1485339410Sjamie#else 1486339410Sjamie tppr = &prison0; 1487195945Sjamie#endif 1488195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1489195974Sjamie if (tpr == pr || 1490195945Sjamie#ifdef VIMAGE 1491195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1492195945Sjamie#endif 1493195974Sjamie tpr->pr_uref == 0) { 1494192895Sjamie descend = 0; 1495195974Sjamie continue; 1496195974Sjamie } 1497195974Sjamie if (!(tpr->pr_flags & PR_IP4_USER)) 1498195974Sjamie continue; 1499195974Sjamie descend = 0; 1500195974Sjamie if (tpr->pr_ip4 == NULL || 1501195974Sjamie (ip4s == 1 && tpr->pr_ip4s == 1)) 1502195974Sjamie continue; 1503195974Sjamie for (ii = 0; ii < ip4s; ii++) { 1504195974Sjamie if (_prison_check_ip4(tpr, &ip4[ii]) == 0) { 1505195974Sjamie error = EADDRINUSE; 1506195974Sjamie vfs_opterror(opts, 1507195974Sjamie "IPv4 addresses clash"); 1508195974Sjamie goto done_deref_locked; 1509192895Sjamie } 1510192895Sjamie } 1511192895Sjamie } 1512192895Sjamie } 1513185435Sbz#endif 1514191673Sjamie#ifdef INET6 1515195974Sjamie if (ip6s > 0) { 1516192895Sjamie if (ppr->pr_flags & PR_IP6) { 1517195974Sjamie /* 1518195974Sjamie * Make sure the new set of IP addresses is a 1519195974Sjamie * subset of the parent's list. 1520195974Sjamie */ 1521195974Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 1522195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[0], 1523195974Sjamie &ppr->pr_ip6[ij])) 1524195974Sjamie break; 1525195974Sjamie if (ij == ppr->pr_ip6s) { 1526195974Sjamie error = EPERM; 1527195974Sjamie goto done_deref_locked; 1528195974Sjamie } 1529195974Sjamie if (ip6s > 1) { 1530195974Sjamie for (ii = ij = 1; ii < ip6s; ii++) { 1531195974Sjamie if (IN6_ARE_ADDR_EQUAL(&ip6[ii], 1532195974Sjamie &ppr->pr_ip6[0])) 1533195974Sjamie continue; 1534195974Sjamie for (; ij < ppr->pr_ip6s; ij++) 1535195974Sjamie if (IN6_ARE_ADDR_EQUAL( 1536195974Sjamie &ip6[ii], &ppr->pr_ip6[ij])) 1537195974Sjamie break; 1538195974Sjamie if (ij == ppr->pr_ip6s) 1539195974Sjamie break; 1540192895Sjamie } 1541192895Sjamie if (ij == ppr->pr_ip6s) { 1542192895Sjamie error = EPERM; 1543192895Sjamie goto done_deref_locked; 1544192895Sjamie } 1545192895Sjamie } 1546192895Sjamie } 1547195974Sjamie /* Check for conflicting IP addresses. */ 1548195945Sjamie#ifdef VIMAGE 1549339410Sjamie for (tppr = ppr; tppr != &prison0; tppr = tppr->pr_parent) 1550195974Sjamie if (tppr->pr_flags & PR_VNET) 1551195974Sjamie break; 1552339410Sjamie#else 1553339410Sjamie tppr = &prison0; 1554195945Sjamie#endif 1555195974Sjamie FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) { 1556195974Sjamie if (tpr == pr || 1557195945Sjamie#ifdef VIMAGE 1558195974Sjamie (tpr != tppr && (tpr->pr_flags & PR_VNET)) || 1559195945Sjamie#endif 1560195974Sjamie tpr->pr_uref == 0) { 1561192895Sjamie descend = 0; 1562195974Sjamie continue; 1563195974Sjamie } 1564195974Sjamie if (!(tpr->pr_flags & PR_IP6_USER)) 1565195974Sjamie continue; 1566195974Sjamie descend = 0; 1567195974Sjamie if (tpr->pr_ip6 == NULL || 1568195974Sjamie (ip6s == 1 && tpr->pr_ip6s == 1)) 1569195974Sjamie continue; 1570195974Sjamie for (ii = 0; ii < ip6s; ii++) { 1571195974Sjamie if (_prison_check_ip6(tpr, &ip6[ii]) == 0) { 1572195974Sjamie error = EADDRINUSE; 1573195974Sjamie vfs_opterror(opts, 1574195974Sjamie "IPv6 addresses clash"); 1575195974Sjamie goto done_deref_locked; 1576192895Sjamie } 1577192895Sjamie } 1578191673Sjamie } 1579192895Sjamie } 1580191673Sjamie#endif 1581192895Sjamie onamelen = namelen = 0; 1582298833Sjamie if (namelc != NULL) { 1583292416Sjamie /* Give a default name of the jid. Also allow the name to be 1584292416Sjamie * explicitly the jid - but not any other number, and only in 1585292416Sjamie * normal form (no leading zero/etc). 1586292416Sjamie */ 1587298833Sjamie if (namelc[0] == '\0') 1588298833Sjamie snprintf(namelc = numbuf, sizeof(numbuf), "%d", jid); 1589292416Sjamie else if ((strtoul(namelc, &p, 10) != jid || 1590292416Sjamie namelc[0] < '1' || namelc[0] > '9') && *p == '\0') { 1591191673Sjamie error = EINVAL; 1592196835Sjamie vfs_opterror(opts, 1593196835Sjamie "name cannot be numeric (unless it is the jid)"); 1594192895Sjamie goto done_deref_locked; 1595191673Sjamie } 1596191673Sjamie /* 1597192895Sjamie * Make sure the name isn't too long for the prison or its 1598192895Sjamie * children. 1599191673Sjamie */ 1600298833Sjamie pnamelen = (ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1; 1601298833Sjamie onamelen = strlen(pr->pr_name + pnamelen); 1602298833Sjamie namelen = strlen(namelc); 1603298833Sjamie if (pnamelen + namelen + 1 > sizeof(pr->pr_name)) { 1604192895Sjamie error = ENAMETOOLONG; 1605192895Sjamie goto done_deref_locked; 1606192895Sjamie } 1607192895Sjamie FOREACH_PRISON_DESCENDANT(pr, tpr, descend) { 1608192895Sjamie if (strlen(tpr->pr_name) + (namelen - onamelen) >= 1609192895Sjamie sizeof(pr->pr_name)) { 1610192895Sjamie error = ENAMETOOLONG; 1611192895Sjamie goto done_deref_locked; 1612192895Sjamie } 1613192895Sjamie } 1614191673Sjamie } 1615192895Sjamie if (pr_allow & ~ppr->pr_allow) { 1616192895Sjamie error = EPERM; 1617192895Sjamie goto done_deref_locked; 1618192895Sjamie } 1619185435Sbz 1620298833Sjamie /* 1621298833Sjamie * Let modules check their parameters. This requires unlocking and 1622298833Sjamie * then re-locking the prison, but this is still a valid state as long 1623298833Sjamie * as allprison_lock remains xlocked. 1624298833Sjamie */ 1625298833Sjamie mtx_unlock(&pr->pr_mtx); 1626298833Sjamie error = osd_jail_call(pr, PR_METHOD_CHECK, opts); 1627298833Sjamie if (error != 0) { 1628298833Sjamie prison_deref(pr, created 1629298833Sjamie ? PD_LIST_XLOCKED 1630298833Sjamie : PD_DEREF | PD_LIST_XLOCKED); 1631298833Sjamie goto done_releroot; 1632298833Sjamie } 1633298833Sjamie mtx_lock(&pr->pr_mtx); 1634298833Sjamie 1635298833Sjamie /* At this point, all valid parameters should have been noted. */ 1636298833Sjamie TAILQ_FOREACH(opt, opts, link) { 1637298833Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 1638298833Sjamie error = EINVAL; 1639298833Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 1640298833Sjamie goto done_deref_locked; 1641298833Sjamie } 1642298833Sjamie } 1643298833Sjamie 1644191673Sjamie /* Set the parameters of the prison. */ 1645191673Sjamie#ifdef INET 1646192895Sjamie redo_ip4 = 0; 1647195974Sjamie if (pr_flags & PR_IP4_USER) { 1648195974Sjamie pr->pr_flags |= PR_IP4; 1649195974Sjamie free(pr->pr_ip4, M_PRISON); 1650195974Sjamie pr->pr_ip4s = ip4s; 1651195974Sjamie pr->pr_ip4 = ip4; 1652195974Sjamie ip4 = NULL; 1653192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1654195945Sjamie#ifdef VIMAGE 1655195945Sjamie if (tpr->pr_flags & PR_VNET) { 1656195945Sjamie descend = 0; 1657195945Sjamie continue; 1658195945Sjamie } 1659195945Sjamie#endif 1660192895Sjamie if (prison_restrict_ip4(tpr, NULL)) { 1661192895Sjamie redo_ip4 = 1; 1662192895Sjamie descend = 0; 1663192895Sjamie } 1664192895Sjamie } 1665185435Sbz } 1666191673Sjamie#endif 1667191673Sjamie#ifdef INET6 1668192895Sjamie redo_ip6 = 0; 1669195974Sjamie if (pr_flags & PR_IP6_USER) { 1670195974Sjamie pr->pr_flags |= PR_IP6; 1671195974Sjamie free(pr->pr_ip6, M_PRISON); 1672195974Sjamie pr->pr_ip6s = ip6s; 1673195974Sjamie pr->pr_ip6 = ip6; 1674195974Sjamie ip6 = NULL; 1675192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1676195945Sjamie#ifdef VIMAGE 1677195945Sjamie if (tpr->pr_flags & PR_VNET) { 1678195945Sjamie descend = 0; 1679195945Sjamie continue; 1680195945Sjamie } 1681195945Sjamie#endif 1682192895Sjamie if (prison_restrict_ip6(tpr, NULL)) { 1683192895Sjamie redo_ip6 = 1; 1684192895Sjamie descend = 0; 1685192895Sjamie } 1686192895Sjamie } 1687191673Sjamie } 1688191673Sjamie#endif 1689192895Sjamie if (gotslevel) { 1690191673Sjamie pr->pr_securelevel = slevel; 1691192895Sjamie /* Set all child jails to be at least this level. */ 1692192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1693192895Sjamie if (tpr->pr_securelevel < slevel) 1694192895Sjamie tpr->pr_securelevel = slevel; 1695192895Sjamie } 1696194762Sjamie if (gotchildmax) { 1697194762Sjamie pr->pr_childmax = childmax; 1698194762Sjamie /* Set all child jails to under this limit. */ 1699194762Sjamie FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level) 1700194762Sjamie if (tpr->pr_childmax > childmax - level) 1701194762Sjamie tpr->pr_childmax = childmax > level 1702194762Sjamie ? childmax - level : 0; 1703194762Sjamie } 1704192895Sjamie if (gotenforce) { 1705192895Sjamie pr->pr_enforce_statfs = enforce; 1706192895Sjamie /* Pass this restriction on to the children. */ 1707192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1708192895Sjamie if (tpr->pr_enforce_statfs < enforce) 1709192895Sjamie tpr->pr_enforce_statfs = enforce; 1710192895Sjamie } 1711231267Smm if (gotrsnum) { 1712231267Smm pr->pr_devfs_rsnum = rsnum; 1713231267Smm /* Pass this restriction on to the children. */ 1714231267Smm FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1715232059Smm tpr->pr_devfs_rsnum = rsnum; 1716231267Smm } 1717298833Sjamie if (namelc != NULL) { 1718192895Sjamie if (ppr == &prison0) 1719298833Sjamie strlcpy(pr->pr_name, namelc, sizeof(pr->pr_name)); 1720192895Sjamie else 1721192895Sjamie snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s", 1722298833Sjamie ppr->pr_name, namelc); 1723192895Sjamie /* Change this component of child names. */ 1724192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1725192895Sjamie bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen, 1726192895Sjamie strlen(tpr->pr_name + onamelen) + 1); 1727192895Sjamie bcopy(pr->pr_name, tpr->pr_name, namelen); 1728192895Sjamie } 1729192895Sjamie } 1730191673Sjamie if (path != NULL) { 1731192895Sjamie /* Try to keep a real-rooted full pathname. */ 1732230129Smm if (fullpath_disabled && path[0] == '/' && 1733230129Smm strcmp(mypr->pr_path, "/")) 1734192895Sjamie snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s", 1735192895Sjamie mypr->pr_path, path); 1736192895Sjamie else 1737192895Sjamie strlcpy(pr->pr_path, path, sizeof(pr->pr_path)); 1738191673Sjamie pr->pr_root = root; 1739191673Sjamie } 1740193066Sjamie if (PR_HOST & ch_flags & ~pr_flags) { 1741193066Sjamie if (pr->pr_flags & PR_HOST) { 1742193066Sjamie /* 1743193066Sjamie * Copy the parent's host info. As with pr_ip4 above, 1744193066Sjamie * the lack of a lock on the parent is not a problem; 1745193066Sjamie * it is always set with allprison_lock at least 1746193066Sjamie * shared, and is held exclusively here. 1747193066Sjamie */ 1748194118Sjamie strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname, 1749194118Sjamie sizeof(pr->pr_hostname)); 1750194118Sjamie strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname, 1751194118Sjamie sizeof(pr->pr_domainname)); 1752194118Sjamie strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid, 1753194118Sjamie sizeof(pr->pr_hostuuid)); 1754193066Sjamie pr->pr_hostid = pr->pr_parent->pr_hostid; 1755193066Sjamie } 1756193066Sjamie } else if (host != NULL || domain != NULL || uuid != NULL || gothid) { 1757193066Sjamie /* Set this prison, and any descendants without PR_HOST. */ 1758193066Sjamie if (host != NULL) 1759194118Sjamie strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname)); 1760193066Sjamie if (domain != NULL) 1761194118Sjamie strlcpy(pr->pr_domainname, domain, 1762194118Sjamie sizeof(pr->pr_domainname)); 1763193066Sjamie if (uuid != NULL) 1764194118Sjamie strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid)); 1765193066Sjamie if (gothid) 1766193066Sjamie pr->pr_hostid = hid; 1767193066Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1768193066Sjamie if (tpr->pr_flags & PR_HOST) 1769193066Sjamie descend = 0; 1770193066Sjamie else { 1771193066Sjamie if (host != NULL) 1772194118Sjamie strlcpy(tpr->pr_hostname, 1773194118Sjamie pr->pr_hostname, 1774194118Sjamie sizeof(tpr->pr_hostname)); 1775193066Sjamie if (domain != NULL) 1776194118Sjamie strlcpy(tpr->pr_domainname, 1777194118Sjamie pr->pr_domainname, 1778194118Sjamie sizeof(tpr->pr_domainname)); 1779193066Sjamie if (uuid != NULL) 1780194118Sjamie strlcpy(tpr->pr_hostuuid, 1781194118Sjamie pr->pr_hostuuid, 1782194118Sjamie sizeof(tpr->pr_hostuuid)); 1783193066Sjamie if (gothid) 1784193066Sjamie tpr->pr_hostid = hid; 1785193066Sjamie } 1786193066Sjamie } 1787193066Sjamie } 1788192895Sjamie if ((tallow = ch_allow & ~pr_allow)) { 1789192895Sjamie /* Clear allow bits in all children. */ 1790192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) 1791192895Sjamie tpr->pr_allow &= ~tallow; 1792192895Sjamie } 1793192895Sjamie pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow; 1794191673Sjamie /* 1795191673Sjamie * Persistent prisons get an extra reference, and prisons losing their 1796191673Sjamie * persist flag lose that reference. Only do this for existing prisons 1797191673Sjamie * for now, so new ones will remain unseen until after the module 1798191673Sjamie * handlers have completed. 1799191673Sjamie */ 1800298833Sjamie born = pr->pr_uref == 0; 1801191673Sjamie if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) { 1802191673Sjamie if (pr_flags & PR_PERSIST) { 1803191673Sjamie pr->pr_ref++; 1804191673Sjamie pr->pr_uref++; 1805191673Sjamie } else { 1806191673Sjamie pr->pr_ref--; 1807191673Sjamie pr->pr_uref--; 1808191673Sjamie } 1809191673Sjamie } 1810191673Sjamie pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags; 1811191673Sjamie mtx_unlock(&pr->pr_mtx); 1812185435Sbz 1813221362Strasz#ifdef RACCT 1814284665Strasz if (racct_enable && created) 1815221362Strasz prison_racct_attach(pr); 1816221362Strasz#endif 1817221362Strasz 1818192895Sjamie /* Locks may have prevented a complete restriction of child IP 1819192895Sjamie * addresses. If so, allocate some more memory and try again. 1820192895Sjamie */ 1821192895Sjamie#ifdef INET 1822192895Sjamie while (redo_ip4) { 1823192895Sjamie ip4s = pr->pr_ip4s; 1824192895Sjamie ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK); 1825192895Sjamie mtx_lock(&pr->pr_mtx); 1826192895Sjamie redo_ip4 = 0; 1827192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1828195945Sjamie#ifdef VIMAGE 1829195945Sjamie if (tpr->pr_flags & PR_VNET) { 1830195945Sjamie descend = 0; 1831195945Sjamie continue; 1832195945Sjamie } 1833195945Sjamie#endif 1834192895Sjamie if (prison_restrict_ip4(tpr, ip4)) { 1835192895Sjamie if (ip4 != NULL) 1836192895Sjamie ip4 = NULL; 1837192895Sjamie else 1838192895Sjamie redo_ip4 = 1; 1839192895Sjamie } 1840192895Sjamie } 1841192895Sjamie mtx_unlock(&pr->pr_mtx); 1842192895Sjamie } 1843192895Sjamie#endif 1844192895Sjamie#ifdef INET6 1845192895Sjamie while (redo_ip6) { 1846192895Sjamie ip6s = pr->pr_ip6s; 1847192895Sjamie ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK); 1848192895Sjamie mtx_lock(&pr->pr_mtx); 1849192895Sjamie redo_ip6 = 0; 1850192895Sjamie FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) { 1851195945Sjamie#ifdef VIMAGE 1852195945Sjamie if (tpr->pr_flags & PR_VNET) { 1853195945Sjamie descend = 0; 1854195945Sjamie continue; 1855195945Sjamie } 1856195945Sjamie#endif 1857192895Sjamie if (prison_restrict_ip6(tpr, ip6)) { 1858192895Sjamie if (ip6 != NULL) 1859192895Sjamie ip6 = NULL; 1860192895Sjamie else 1861192895Sjamie redo_ip6 = 1; 1862192895Sjamie } 1863192895Sjamie } 1864192895Sjamie mtx_unlock(&pr->pr_mtx); 1865192895Sjamie } 1866192895Sjamie#endif 1867192895Sjamie 1868191673Sjamie /* Let the modules do their work. */ 1869191673Sjamie sx_downgrade(&allprison_lock); 1870298833Sjamie if (born) { 1871191673Sjamie error = osd_jail_call(pr, PR_METHOD_CREATE, opts); 1872191673Sjamie if (error) { 1873298833Sjamie (void)osd_jail_call(pr, PR_METHOD_REMOVE, NULL); 1874298833Sjamie prison_deref(pr, created 1875298833Sjamie ? PD_LIST_SLOCKED 1876298833Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1877191673Sjamie goto done_errmsg; 1878191673Sjamie } 1879191673Sjamie } 1880191673Sjamie error = osd_jail_call(pr, PR_METHOD_SET, opts); 1881191673Sjamie if (error) { 1882298833Sjamie if (born) 1883298833Sjamie (void)osd_jail_call(pr, PR_METHOD_REMOVE, NULL); 1884191673Sjamie prison_deref(pr, created 1885191673Sjamie ? PD_LIST_SLOCKED 1886191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1887191673Sjamie goto done_errmsg; 1888191673Sjamie } 1889191673Sjamie 1890191673Sjamie /* Attach this process to the prison if requested. */ 1891191673Sjamie if (flags & JAIL_ATTACH) { 1892191673Sjamie mtx_lock(&pr->pr_mtx); 1893191673Sjamie error = do_jail_attach(td, pr); 1894191673Sjamie if (error) { 1895191673Sjamie vfs_opterror(opts, "attach failed"); 1896191673Sjamie if (!created) 1897191673Sjamie prison_deref(pr, PD_DEREF); 1898191673Sjamie goto done_errmsg; 1899191673Sjamie } 1900191673Sjamie } 1901191673Sjamie 1902235803Strasz#ifdef RACCT 1903284665Strasz if (racct_enable && !created) { 1904271622Strasz if (!(flags & JAIL_ATTACH)) 1905271622Strasz sx_sunlock(&allprison_lock); 1906235803Strasz prison_racct_modify(pr); 1907271622Strasz if (!(flags & JAIL_ATTACH)) 1908271622Strasz sx_slock(&allprison_lock); 1909235803Strasz } 1910235803Strasz#endif 1911235803Strasz 1912235803Strasz td->td_retval[0] = pr->pr_id; 1913235803Strasz 1914191673Sjamie /* 1915191673Sjamie * Now that it is all there, drop the temporary reference from existing 1916191673Sjamie * prisons. Or add a reference to newly created persistent prisons 1917191673Sjamie * (which was not done earlier so that the prison would not be publicly 1918191673Sjamie * visible). 1919191673Sjamie */ 1920191673Sjamie if (!created) { 1921191673Sjamie prison_deref(pr, (flags & JAIL_ATTACH) 1922191673Sjamie ? PD_DEREF 1923191673Sjamie : PD_DEREF | PD_LIST_SLOCKED); 1924191673Sjamie } else { 1925191673Sjamie if (pr_flags & PR_PERSIST) { 1926191673Sjamie mtx_lock(&pr->pr_mtx); 1927191673Sjamie pr->pr_ref++; 1928191673Sjamie pr->pr_uref++; 1929191673Sjamie mtx_unlock(&pr->pr_mtx); 1930191673Sjamie } 1931191673Sjamie if (!(flags & JAIL_ATTACH)) 1932191673Sjamie sx_sunlock(&allprison_lock); 1933191673Sjamie } 1934232598Strasz 1935298833Sjamie goto done_free; 1936191673Sjamie 1937192895Sjamie done_deref_locked: 1938192895Sjamie prison_deref(pr, created 1939192895Sjamie ? PD_LOCKED | PD_LIST_XLOCKED 1940192895Sjamie : PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 1941192895Sjamie goto done_releroot; 1942191673Sjamie done_unlock_list: 1943191673Sjamie sx_xunlock(&allprison_lock); 1944191673Sjamie done_releroot: 1945241896Skib if (root != NULL) 1946191673Sjamie vrele(root); 1947191673Sjamie done_errmsg: 1948191673Sjamie if (error) { 1949301908Sjamie if (vfs_getopt(opts, "errmsg", (void **)&errmsg, 1950301908Sjamie &errmsg_len) == 0 && errmsg_len > 0) { 1951191673Sjamie errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1; 1952301908Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 1953301908Sjamie bcopy(errmsg, 1954301908Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1955301908Sjamie errmsg_len); 1956301908Sjamie else 1957301908Sjamie copyout(errmsg, 1958301908Sjamie optuio->uio_iov[errmsg_pos].iov_base, 1959301908Sjamie errmsg_len); 1960191673Sjamie } 1961191673Sjamie } 1962191673Sjamie done_free: 1963191673Sjamie#ifdef INET 1964191673Sjamie free(ip4, M_PRISON); 1965191673Sjamie#endif 1966191673Sjamie#ifdef INET6 1967191673Sjamie free(ip6, M_PRISON); 1968191673Sjamie#endif 1969230407Smm if (g_path != NULL) 1970230407Smm free(g_path, M_TEMP); 1971191673Sjamie vfs_freeopts(opts); 1972191673Sjamie return (error); 1973191673Sjamie} 1974191673Sjamie 1975191673Sjamie 197682710Sdillon/* 1977191673Sjamie * struct jail_get_args { 1978191673Sjamie * struct iovec *iovp; 1979191673Sjamie * unsigned int iovcnt; 1980191673Sjamie * int flags; 1981114168Smike * }; 198282710Sdillon */ 198346155Sphkint 1984225617Skmacysys_jail_get(struct thread *td, struct jail_get_args *uap) 198546155Sphk{ 1986191673Sjamie struct uio *auio; 1987185435Sbz int error; 1988185435Sbz 1989191673Sjamie /* Check that we have an even number of iovecs. */ 1990191673Sjamie if (uap->iovcnt & 1) 1991191673Sjamie return (EINVAL); 1992191673Sjamie 1993191673Sjamie error = copyinuio(uap->iovp, uap->iovcnt, &auio); 1994185435Sbz if (error) 1995185435Sbz return (error); 1996191673Sjamie error = kern_jail_get(td, auio, uap->flags); 1997191673Sjamie if (error == 0) 1998191673Sjamie error = copyout(auio->uio_iov, uap->iovp, 1999191673Sjamie uap->iovcnt * sizeof (struct iovec)); 2000191673Sjamie free(auio, M_IOV); 2001191673Sjamie return (error); 2002191673Sjamie} 2003185435Sbz 2004191673Sjamieint 2005191673Sjamiekern_jail_get(struct thread *td, struct uio *optuio, int flags) 2006191673Sjamie{ 2007192895Sjamie struct prison *pr, *mypr; 2008191673Sjamie struct vfsopt *opt; 2009191673Sjamie struct vfsoptlist *opts; 2010191673Sjamie char *errmsg, *name; 2011192895Sjamie int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos; 2012185435Sbz 2013191673Sjamie if (flags & ~JAIL_GET_MASK) 2014191673Sjamie return (EINVAL); 2015185435Sbz 2016191673Sjamie /* Get the parameter list. */ 2017191673Sjamie error = vfs_buildopts(optuio, &opts); 2018191673Sjamie if (error) 2019191673Sjamie return (error); 2020191673Sjamie errmsg_pos = vfs_getopt_pos(opts, "errmsg"); 2021192895Sjamie mypr = td->td_ucred->cr_prison; 2022185435Sbz 2023191673Sjamie /* 2024191673Sjamie * Find the prison specified by one of: lastjid, jid, name. 2025191673Sjamie */ 2026191673Sjamie sx_slock(&allprison_lock); 2027191673Sjamie error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid)); 2028191673Sjamie if (error == 0) { 2029191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2030192895Sjamie if (pr->pr_id > jid && prison_ischild(mypr, pr)) { 2031191673Sjamie mtx_lock(&pr->pr_mtx); 2032191673Sjamie if (pr->pr_ref > 0 && 2033191673Sjamie (pr->pr_uref > 0 || (flags & JAIL_DYING))) 2034191673Sjamie break; 2035191673Sjamie mtx_unlock(&pr->pr_mtx); 2036191673Sjamie } 2037191673Sjamie } 2038191673Sjamie if (pr != NULL) 2039191673Sjamie goto found_prison; 2040191673Sjamie error = ENOENT; 2041191673Sjamie vfs_opterror(opts, "no jail after %d", jid); 2042191673Sjamie goto done_unlock_list; 2043191673Sjamie } else if (error != ENOENT) 2044191673Sjamie goto done_unlock_list; 2045185435Sbz 2046191673Sjamie error = vfs_copyopt(opts, "jid", &jid, sizeof(jid)); 2047191673Sjamie if (error == 0) { 2048191673Sjamie if (jid != 0) { 2049192895Sjamie pr = prison_find_child(mypr, jid); 2050191673Sjamie if (pr != NULL) { 2051191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 2052191673Sjamie mtx_unlock(&pr->pr_mtx); 2053191673Sjamie error = ENOENT; 2054191673Sjamie vfs_opterror(opts, "jail %d is dying", 2055191673Sjamie jid); 2056191673Sjamie goto done_unlock_list; 2057191673Sjamie } 2058191673Sjamie goto found_prison; 2059191673Sjamie } 2060191673Sjamie error = ENOENT; 2061191673Sjamie vfs_opterror(opts, "jail %d not found", jid); 2062191673Sjamie goto done_unlock_list; 2063191673Sjamie } 2064191673Sjamie } else if (error != ENOENT) 2065191673Sjamie goto done_unlock_list; 206646155Sphk 2067191673Sjamie error = vfs_getopt(opts, "name", (void **)&name, &len); 2068191673Sjamie if (error == 0) { 2069191673Sjamie if (len == 0 || name[len - 1] != '\0') { 2070191673Sjamie error = EINVAL; 2071191673Sjamie goto done_unlock_list; 2072191673Sjamie } 2073192895Sjamie pr = prison_find_name(mypr, name); 2074191673Sjamie if (pr != NULL) { 2075191673Sjamie if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) { 2076191673Sjamie mtx_unlock(&pr->pr_mtx); 2077191673Sjamie error = ENOENT; 2078191673Sjamie vfs_opterror(opts, "jail \"%s\" is dying", 2079191673Sjamie name); 2080191673Sjamie goto done_unlock_list; 2081191673Sjamie } 2082191673Sjamie goto found_prison; 2083191673Sjamie } 2084191673Sjamie error = ENOENT; 2085191673Sjamie vfs_opterror(opts, "jail \"%s\" not found", name); 2086191673Sjamie goto done_unlock_list; 2087191673Sjamie } else if (error != ENOENT) 2088191673Sjamie goto done_unlock_list; 2089185435Sbz 2090191673Sjamie vfs_opterror(opts, "no jail specified"); 2091191673Sjamie error = ENOENT; 2092191673Sjamie goto done_unlock_list; 2093191673Sjamie 2094191673Sjamie found_prison: 2095191673Sjamie /* Get the parameters of the prison. */ 2096191673Sjamie pr->pr_ref++; 2097191673Sjamie locked = PD_LOCKED; 2098191673Sjamie td->td_retval[0] = pr->pr_id; 2099191673Sjamie error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id)); 2100191673Sjamie if (error != 0 && error != ENOENT) 2101191673Sjamie goto done_deref; 2102192895Sjamie i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id; 2103192895Sjamie error = vfs_setopt(opts, "parent", &i, sizeof(i)); 2104191673Sjamie if (error != 0 && error != ENOENT) 2105191673Sjamie goto done_deref; 2106192895Sjamie error = vfs_setopts(opts, "name", prison_name(mypr, pr)); 2107192895Sjamie if (error != 0 && error != ENOENT) 2108192895Sjamie goto done_deref; 2109192895Sjamie error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id, 2110191673Sjamie sizeof(pr->pr_cpuset->cs_id)); 2111191673Sjamie if (error != 0 && error != ENOENT) 2112191673Sjamie goto done_deref; 2113192895Sjamie error = vfs_setopts(opts, "path", prison_path(mypr, pr)); 2114191673Sjamie if (error != 0 && error != ENOENT) 2115191673Sjamie goto done_deref; 2116191673Sjamie#ifdef INET 2117191673Sjamie error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4, 2118191673Sjamie pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2119191673Sjamie if (error != 0 && error != ENOENT) 2120191673Sjamie goto done_deref; 2121191673Sjamie#endif 2122191673Sjamie#ifdef INET6 2123191673Sjamie error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6, 2124191673Sjamie pr->pr_ip6s * sizeof(*pr->pr_ip6)); 2125191673Sjamie if (error != 0 && error != ENOENT) 2126191673Sjamie goto done_deref; 2127191673Sjamie#endif 2128191673Sjamie error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel, 2129191673Sjamie sizeof(pr->pr_securelevel)); 2130191673Sjamie if (error != 0 && error != ENOENT) 2131191673Sjamie goto done_deref; 2132194762Sjamie error = vfs_setopt(opts, "children.cur", &pr->pr_childcount, 2133194762Sjamie sizeof(pr->pr_childcount)); 2134194762Sjamie if (error != 0 && error != ENOENT) 2135194762Sjamie goto done_deref; 2136194762Sjamie error = vfs_setopt(opts, "children.max", &pr->pr_childmax, 2137194762Sjamie sizeof(pr->pr_childmax)); 2138194762Sjamie if (error != 0 && error != ENOENT) 2139194762Sjamie goto done_deref; 2140194118Sjamie error = vfs_setopts(opts, "host.hostname", pr->pr_hostname); 2141191673Sjamie if (error != 0 && error != ENOENT) 2142191673Sjamie goto done_deref; 2143194118Sjamie error = vfs_setopts(opts, "host.domainname", pr->pr_domainname); 2144193066Sjamie if (error != 0 && error != ENOENT) 2145193066Sjamie goto done_deref; 2146194118Sjamie error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid); 2147193066Sjamie if (error != 0 && error != ENOENT) 2148193066Sjamie goto done_deref; 2149205014Snwhitehorn#ifdef COMPAT_FREEBSD32 2150217896Sdchagin if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { 2151193066Sjamie uint32_t hid32 = pr->pr_hostid; 2152193066Sjamie 2153193066Sjamie error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32)); 2154193066Sjamie } else 2155193066Sjamie#endif 2156193066Sjamie error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid, 2157193066Sjamie sizeof(pr->pr_hostid)); 2158193066Sjamie if (error != 0 && error != ENOENT) 2159193066Sjamie goto done_deref; 2160192895Sjamie error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs, 2161192895Sjamie sizeof(pr->pr_enforce_statfs)); 2162191673Sjamie if (error != 0 && error != ENOENT) 2163191673Sjamie goto done_deref; 2164231267Smm error = vfs_setopt(opts, "devfs_ruleset", &pr->pr_devfs_rsnum, 2165231267Smm sizeof(pr->pr_devfs_rsnum)); 2166231267Smm if (error != 0 && error != ENOENT) 2167231267Smm goto done_deref; 2168192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 2169192895Sjamie fi++) { 2170192895Sjamie if (pr_flag_names[fi] == NULL) 2171192895Sjamie continue; 2172192895Sjamie i = (pr->pr_flags & (1 << fi)) ? 1 : 0; 2173192895Sjamie error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i)); 2174192895Sjamie if (error != 0 && error != ENOENT) 2175192895Sjamie goto done_deref; 2176192895Sjamie i = !i; 2177192895Sjamie error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i)); 2178192895Sjamie if (error != 0 && error != ENOENT) 2179192895Sjamie goto done_deref; 2180192895Sjamie } 2181195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 2182195870Sjamie fi++) { 2183195870Sjamie i = pr->pr_flags & 2184195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 2185195870Sjamie i = pr_flag_jailsys[fi].disable && 2186195870Sjamie (i == pr_flag_jailsys[fi].disable) ? JAIL_SYS_DISABLE 2187195870Sjamie : (i == pr_flag_jailsys[fi].new) ? JAIL_SYS_NEW 2188195870Sjamie : JAIL_SYS_INHERIT; 2189195870Sjamie error = 2190195870Sjamie vfs_setopt(opts, pr_flag_jailsys[fi].name, &i, sizeof(i)); 2191195870Sjamie if (error != 0 && error != ENOENT) 2192195870Sjamie goto done_deref; 2193195870Sjamie } 2194192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 2195192895Sjamie fi++) { 2196192895Sjamie if (pr_allow_names[fi] == NULL) 2197192895Sjamie continue; 2198192895Sjamie i = (pr->pr_allow & (1 << fi)) ? 1 : 0; 2199192895Sjamie error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i)); 2200192895Sjamie if (error != 0 && error != ENOENT) 2201192895Sjamie goto done_deref; 2202192895Sjamie i = !i; 2203192895Sjamie error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i)); 2204192895Sjamie if (error != 0 && error != ENOENT) 2205192895Sjamie goto done_deref; 2206192895Sjamie } 2207191673Sjamie i = (pr->pr_uref == 0); 2208191673Sjamie error = vfs_setopt(opts, "dying", &i, sizeof(i)); 2209191673Sjamie if (error != 0 && error != ENOENT) 2210191673Sjamie goto done_deref; 2211191673Sjamie i = !i; 2212191673Sjamie error = vfs_setopt(opts, "nodying", &i, sizeof(i)); 2213191673Sjamie if (error != 0 && error != ENOENT) 2214191673Sjamie goto done_deref; 2215280632Sian error = vfs_setopt(opts, "osreldate", &pr->pr_osreldate, 2216280632Sian sizeof(pr->pr_osreldate)); 2217280632Sian if (error != 0 && error != ENOENT) 2218280632Sian goto done_deref; 2219280632Sian error = vfs_setopts(opts, "osrelease", pr->pr_osrelease); 2220280632Sian if (error != 0 && error != ENOENT) 2221280632Sian goto done_deref; 2222191673Sjamie 2223191673Sjamie /* Get the module parameters. */ 2224191673Sjamie mtx_unlock(&pr->pr_mtx); 2225191673Sjamie locked = 0; 2226191673Sjamie error = osd_jail_call(pr, PR_METHOD_GET, opts); 222746155Sphk if (error) 2228191673Sjamie goto done_deref; 2229191673Sjamie prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED); 223084828Sjhb 2231191673Sjamie /* By now, all parameters should have been noted. */ 2232191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2233191673Sjamie if (!opt->seen && strcmp(opt->name, "errmsg")) { 2234191673Sjamie error = EINVAL; 2235191673Sjamie vfs_opterror(opts, "unknown parameter: %s", opt->name); 2236191673Sjamie goto done_errmsg; 2237191673Sjamie } 2238185435Sbz } 2239191673Sjamie 2240191673Sjamie /* Write the fetched parameters back to userspace. */ 2241191673Sjamie error = 0; 2242191673Sjamie TAILQ_FOREACH(opt, opts, link) { 2243191673Sjamie if (opt->pos >= 0 && opt->pos != errmsg_pos) { 2244191673Sjamie pos = 2 * opt->pos + 1; 2245191673Sjamie optuio->uio_iov[pos].iov_len = opt->len; 2246191673Sjamie if (opt->value != NULL) { 2247191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) { 2248191673Sjamie bcopy(opt->value, 2249191673Sjamie optuio->uio_iov[pos].iov_base, 2250191673Sjamie opt->len); 2251191673Sjamie } else { 2252191673Sjamie error = copyout(opt->value, 2253191673Sjamie optuio->uio_iov[pos].iov_base, 2254191673Sjamie opt->len); 2255191673Sjamie if (error) 2256191673Sjamie break; 2257191673Sjamie } 2258191673Sjamie } 2259191673Sjamie } 2260185435Sbz } 2261191673Sjamie goto done_errmsg; 2262191673Sjamie 2263191673Sjamie done_deref: 2264191673Sjamie prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED); 2265191673Sjamie goto done_errmsg; 2266191673Sjamie 2267191673Sjamie done_unlock_list: 2268191673Sjamie sx_sunlock(&allprison_lock); 2269191673Sjamie done_errmsg: 2270191673Sjamie if (error && errmsg_pos >= 0) { 2271191673Sjamie vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len); 2272191673Sjamie errmsg_pos = 2 * errmsg_pos + 1; 2273191673Sjamie if (errmsg_len > 0) { 2274191673Sjamie if (optuio->uio_segflg == UIO_SYSSPACE) 2275191673Sjamie bcopy(errmsg, 2276191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2277191673Sjamie errmsg_len); 2278191673Sjamie else 2279191673Sjamie copyout(errmsg, 2280191673Sjamie optuio->uio_iov[errmsg_pos].iov_base, 2281191673Sjamie errmsg_len); 2282191673Sjamie } 2283185435Sbz } 2284191673Sjamie vfs_freeopts(opts); 2285191673Sjamie return (error); 2286191673Sjamie} 2287113275Smike 2288192895Sjamie 2289191673Sjamie/* 2290191673Sjamie * struct jail_remove_args { 2291191673Sjamie * int jid; 2292191673Sjamie * }; 2293191673Sjamie */ 2294191673Sjamieint 2295225617Skmacysys_jail_remove(struct thread *td, struct jail_remove_args *uap) 2296191673Sjamie{ 2297192895Sjamie struct prison *pr, *cpr, *lpr, *tpr; 2298192895Sjamie int descend, error; 2299185435Sbz 2300191673Sjamie error = priv_check(td, PRIV_JAIL_REMOVE); 2301185435Sbz if (error) 2302191673Sjamie return (error); 2303185435Sbz 2304185435Sbz sx_xlock(&allprison_lock); 2305192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2306191673Sjamie if (pr == NULL) { 2307185435Sbz sx_xunlock(&allprison_lock); 2308191673Sjamie return (EINVAL); 2309185435Sbz } 2310185435Sbz 2311192895Sjamie /* Remove all descendants of this prison, then remove this prison. */ 2312192895Sjamie pr->pr_ref++; 2313192895Sjamie if (!LIST_EMPTY(&pr->pr_children)) { 2314192895Sjamie mtx_unlock(&pr->pr_mtx); 2315192895Sjamie lpr = NULL; 2316192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 2317192895Sjamie mtx_lock(&cpr->pr_mtx); 2318192895Sjamie if (cpr->pr_ref > 0) { 2319192895Sjamie tpr = cpr; 2320192895Sjamie cpr->pr_ref++; 2321192895Sjamie } else { 2322192895Sjamie /* Already removed - do not do it again. */ 2323192895Sjamie tpr = NULL; 2324192895Sjamie } 2325192895Sjamie mtx_unlock(&cpr->pr_mtx); 2326192895Sjamie if (lpr != NULL) { 2327192895Sjamie mtx_lock(&lpr->pr_mtx); 2328192895Sjamie prison_remove_one(lpr); 2329192895Sjamie sx_xlock(&allprison_lock); 2330192895Sjamie } 2331192895Sjamie lpr = tpr; 2332192895Sjamie } 2333192895Sjamie if (lpr != NULL) { 2334192895Sjamie mtx_lock(&lpr->pr_mtx); 2335192895Sjamie prison_remove_one(lpr); 2336192895Sjamie sx_xlock(&allprison_lock); 2337192895Sjamie } 2338192895Sjamie mtx_lock(&pr->pr_mtx); 2339192895Sjamie } 2340192895Sjamie prison_remove_one(pr); 2341192895Sjamie return (0); 2342192895Sjamie} 2343192895Sjamie 2344192895Sjamiestatic void 2345192895Sjamieprison_remove_one(struct prison *pr) 2346192895Sjamie{ 2347192895Sjamie struct proc *p; 2348192895Sjamie int deuref; 2349192895Sjamie 2350191673Sjamie /* If the prison was persistent, it is not anymore. */ 2351191673Sjamie deuref = 0; 2352191673Sjamie if (pr->pr_flags & PR_PERSIST) { 2353191673Sjamie pr->pr_ref--; 2354191673Sjamie deuref = PD_DEUREF; 2355191673Sjamie pr->pr_flags &= ~PR_PERSIST; 2356179881Sdelphij } 2357113275Smike 2358192895Sjamie /* 2359192895Sjamie * jail_remove added a reference. If that's the only one, remove 2360192895Sjamie * the prison now. 2361192895Sjamie */ 2362192895Sjamie KASSERT(pr->pr_ref > 0, 2363192895Sjamie ("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id)); 2364192895Sjamie if (pr->pr_ref == 1) { 2365191673Sjamie prison_deref(pr, 2366191673Sjamie deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED); 2367192895Sjamie return; 2368191673Sjamie } 2369191673Sjamie 2370113275Smike mtx_unlock(&pr->pr_mtx); 2371191673Sjamie sx_xunlock(&allprison_lock); 2372191673Sjamie /* 2373191673Sjamie * Kill all processes unfortunate enough to be attached to this prison. 2374191673Sjamie */ 2375191673Sjamie sx_slock(&allproc_lock); 2376191673Sjamie LIST_FOREACH(p, &allproc, p_list) { 2377191673Sjamie PROC_LOCK(p); 2378191673Sjamie if (p->p_state != PRS_NEW && p->p_ucred && 2379191673Sjamie p->p_ucred->cr_prison == pr) 2380225617Skmacy kern_psignal(p, SIGKILL); 2381191673Sjamie PROC_UNLOCK(p); 2382191673Sjamie } 2383191673Sjamie sx_sunlock(&allproc_lock); 2384192895Sjamie /* Remove the temporary reference added by jail_remove. */ 2385191673Sjamie prison_deref(pr, deuref | PD_DEREF); 2386113275Smike} 2387113275Smike 2388190466Sjamie 2389113275Smike/* 2390114168Smike * struct jail_attach_args { 2391114168Smike * int jid; 2392114168Smike * }; 2393113275Smike */ 2394113275Smikeint 2395225617Skmacysys_jail_attach(struct thread *td, struct jail_attach_args *uap) 2396113275Smike{ 2397113275Smike struct prison *pr; 2398191673Sjamie int error; 2399167309Spjd 2400164032Srwatson error = priv_check(td, PRIV_JAIL_ATTACH); 2401126023Snectar if (error) 2402126023Snectar return (error); 2403126023Snectar 2404301907Sjamie /* 2405301907Sjamie * Start with exclusive hold on allprison_lock to ensure that a possible 2406301907Sjamie * PR_METHOD_REMOVE call isn't concurrent with jail_set or jail_remove. 2407301907Sjamie * But then immediately downgrade it since we don't need to stop 2408301907Sjamie * readers. 2409301907Sjamie */ 2410301907Sjamie sx_xlock(&allprison_lock); 2411301907Sjamie sx_downgrade(&allprison_lock); 2412192895Sjamie pr = prison_find_child(td->td_ucred->cr_prison, uap->jid); 2413113275Smike if (pr == NULL) { 2414168401Spjd sx_sunlock(&allprison_lock); 2415113275Smike return (EINVAL); 2416113275Smike } 2417185435Sbz 2418185435Sbz /* 2419185435Sbz * Do not allow a process to attach to a prison that is not 2420191673Sjamie * considered to be "alive". 2421185435Sbz */ 2422191673Sjamie if (pr->pr_uref == 0) { 2423185435Sbz mtx_unlock(&pr->pr_mtx); 2424185435Sbz sx_sunlock(&allprison_lock); 2425185435Sbz return (EINVAL); 2426185435Sbz } 2427191673Sjamie 2428191673Sjamie return (do_jail_attach(td, pr)); 2429191673Sjamie} 2430191673Sjamie 2431191673Sjamiestatic int 2432191673Sjamiedo_jail_attach(struct thread *td, struct prison *pr) 2433191673Sjamie{ 2434191673Sjamie struct proc *p; 2435191673Sjamie struct ucred *newcred, *oldcred; 2436241896Skib int error; 2437191673Sjamie 2438191673Sjamie /* 2439191673Sjamie * XXX: Note that there is a slight race here if two threads 2440191673Sjamie * in the same privileged process attempt to attach to two 2441191673Sjamie * different jails at the same time. It is important for 2442191673Sjamie * user processes not to do this, or they might end up with 2443191673Sjamie * a process root from one prison, but attached to the jail 2444191673Sjamie * of another. 2445191673Sjamie */ 2446113275Smike pr->pr_ref++; 2447191673Sjamie pr->pr_uref++; 2448113275Smike mtx_unlock(&pr->pr_mtx); 2449191673Sjamie 2450191673Sjamie /* Let modules do whatever they need to prepare for attaching. */ 2451191673Sjamie error = osd_jail_call(pr, PR_METHOD_ATTACH, td); 2452191673Sjamie if (error) { 2453191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED); 2454191673Sjamie return (error); 2455191673Sjamie } 2456168401Spjd sx_sunlock(&allprison_lock); 2457113275Smike 2458185435Sbz /* 2459185435Sbz * Reparent the newly attached process to this jail. 2460185435Sbz */ 2461191673Sjamie p = td->td_proc; 2462185435Sbz error = cpuset_setproc_update_set(p, pr->pr_cpuset); 2463185435Sbz if (error) 2464191673Sjamie goto e_revert_osd; 2465185435Sbz 2466175202Sattilio vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY); 2467113275Smike if ((error = change_dir(pr->pr_root, td)) != 0) 2468113275Smike goto e_unlock; 2469113275Smike#ifdef MAC 2470172930Srwatson if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root))) 2471113275Smike goto e_unlock; 2472113275Smike#endif 2473175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2474191673Sjamie if ((error = change_root(pr->pr_root, td))) 2475241896Skib goto e_revert_osd; 2476113275Smike 247784828Sjhb newcred = crget(); 247884828Sjhb PROC_LOCK(p); 2479298833Sjamie oldcred = crcopysafe(p, newcred); 2480113630Sjhb newcred->cr_prison = pr; 2481302229Sbdrewery proc_set_cred(p, newcred); 2482298833Sjamie setsugid(p); 248384828Sjhb PROC_UNLOCK(p); 2484220137Strasz#ifdef RACCT 2485220137Strasz racct_proc_ucred_changed(p, oldcred, newcred); 2486220137Strasz#endif 2487298833Sjamie prison_deref(oldcred->cr_prison, PD_DEREF | PD_DEUREF); 248884828Sjhb crfree(oldcred); 248946155Sphk return (0); 2490298833Sjamie 2491191673Sjamie e_unlock: 2492175294Sattilio VOP_UNLOCK(pr->pr_root, 0); 2493191673Sjamie e_revert_osd: 2494191673Sjamie /* Tell modules this thread is still in its old jail after all. */ 2495298833Sjamie (void)osd_jail_call(td->td_ucred->cr_prison, PR_METHOD_ATTACH, td); 2496191673Sjamie prison_deref(pr, PD_DEREF | PD_DEUREF); 249746155Sphk return (error); 249846155Sphk} 249946155Sphk 2500192895Sjamie 2501113275Smike/* 2502113275Smike * Returns a locked prison instance, or NULL on failure. 2503113275Smike */ 2504168399Spjdstruct prison * 2505113275Smikeprison_find(int prid) 2506113275Smike{ 2507113275Smike struct prison *pr; 2508113275Smike 2509168401Spjd sx_assert(&allprison_lock, SX_LOCKED); 2510191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 2511113275Smike if (pr->pr_id == prid) { 2512113275Smike mtx_lock(&pr->pr_mtx); 2513191673Sjamie if (pr->pr_ref > 0) 2514191673Sjamie return (pr); 2515191673Sjamie mtx_unlock(&pr->pr_mtx); 2516113275Smike } 2517113275Smike } 2518113275Smike return (NULL); 2519113275Smike} 2520113275Smike 2521191673Sjamie/* 2522192895Sjamie * Find a prison that is a descendant of mypr. Returns a locked prison or NULL. 2523191673Sjamie */ 2524191673Sjamiestruct prison * 2525192895Sjamieprison_find_child(struct prison *mypr, int prid) 2526191673Sjamie{ 2527192895Sjamie struct prison *pr; 2528192895Sjamie int descend; 2529192895Sjamie 2530192895Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2531192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2532192895Sjamie if (pr->pr_id == prid) { 2533192895Sjamie mtx_lock(&pr->pr_mtx); 2534192895Sjamie if (pr->pr_ref > 0) 2535192895Sjamie return (pr); 2536192895Sjamie mtx_unlock(&pr->pr_mtx); 2537192895Sjamie } 2538192895Sjamie } 2539192895Sjamie return (NULL); 2540192895Sjamie} 2541192895Sjamie 2542192895Sjamie/* 2543192895Sjamie * Look for the name relative to mypr. Returns a locked prison or NULL. 2544192895Sjamie */ 2545192895Sjamiestruct prison * 2546192895Sjamieprison_find_name(struct prison *mypr, const char *name) 2547192895Sjamie{ 2548191673Sjamie struct prison *pr, *deadpr; 2549192895Sjamie size_t mylen; 2550192895Sjamie int descend; 2551191673Sjamie 2552191673Sjamie sx_assert(&allprison_lock, SX_LOCKED); 2553192895Sjamie mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1; 2554191673Sjamie again: 2555191673Sjamie deadpr = NULL; 2556192895Sjamie FOREACH_PRISON_DESCENDANT(mypr, pr, descend) { 2557192895Sjamie if (!strcmp(pr->pr_name + mylen, name)) { 2558191673Sjamie mtx_lock(&pr->pr_mtx); 2559191673Sjamie if (pr->pr_ref > 0) { 2560191673Sjamie if (pr->pr_uref > 0) 2561191673Sjamie return (pr); 2562191673Sjamie deadpr = pr; 2563191673Sjamie } 2564191673Sjamie mtx_unlock(&pr->pr_mtx); 2565191673Sjamie } 2566191673Sjamie } 2567192895Sjamie /* There was no valid prison - perhaps there was a dying one. */ 2568191673Sjamie if (deadpr != NULL) { 2569191673Sjamie mtx_lock(&deadpr->pr_mtx); 2570191673Sjamie if (deadpr->pr_ref == 0) { 2571191673Sjamie mtx_unlock(&deadpr->pr_mtx); 2572191673Sjamie goto again; 2573191673Sjamie } 2574191673Sjamie } 2575191673Sjamie return (deadpr); 2576191673Sjamie} 2577191673Sjamie 2578191673Sjamie/* 2579192895Sjamie * See if a prison has the specific flag set. 2580192895Sjamie */ 2581192895Sjamieint 2582192895Sjamieprison_flag(struct ucred *cred, unsigned flag) 2583192895Sjamie{ 2584192895Sjamie 2585192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2586192895Sjamie return (cred->cr_prison->pr_flags & flag); 2587192895Sjamie} 2588192895Sjamie 2589192895Sjamieint 2590192895Sjamieprison_allow(struct ucred *cred, unsigned flag) 2591192895Sjamie{ 2592192895Sjamie 2593192895Sjamie /* This is an atomic read, so no locking is necessary. */ 2594192895Sjamie return (cred->cr_prison->pr_allow & flag); 2595192895Sjamie} 2596192895Sjamie 2597192895Sjamie/* 2598191673Sjamie * Remove a prison reference. If that was the last reference, remove the 2599191673Sjamie * prison itself - but not in this context in case there are locks held. 2600191673Sjamie */ 260172786Srwatsonvoid 2602185029Spjdprison_free_locked(struct prison *pr) 260372786Srwatson{ 2604298833Sjamie int ref; 260572786Srwatson 2606185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2607298833Sjamie ref = --pr->pr_ref; 2608298833Sjamie mtx_unlock(&pr->pr_mtx); 2609298833Sjamie if (ref == 0) 2610144660Sjeff taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 261172786Srwatson} 261272786Srwatson 2613185029Spjdvoid 2614185029Spjdprison_free(struct prison *pr) 2615185029Spjd{ 2616185029Spjd 2617185029Spjd mtx_lock(&pr->pr_mtx); 2618185029Spjd prison_free_locked(pr); 2619185029Spjd} 2620185029Spjd 2621298833Sjamie/* 2622298833Sjamie * Complete a call to either prison_free or prison_proc_free. 2623298833Sjamie */ 2624124882Srwatsonstatic void 2625124882Srwatsonprison_complete(void *context, int pending) 2626124882Srwatson{ 2627298833Sjamie struct prison *pr = context; 2628191673Sjamie 2629301907Sjamie sx_xlock(&allprison_lock); 2630298833Sjamie mtx_lock(&pr->pr_mtx); 2631298833Sjamie prison_deref(pr, pr->pr_uref 2632301907Sjamie ? PD_DEREF | PD_DEUREF | PD_LOCKED | PD_LIST_XLOCKED 2633301907Sjamie : PD_LOCKED | PD_LIST_XLOCKED); 2634191673Sjamie} 2635191673Sjamie 2636191673Sjamie/* 2637191673Sjamie * Remove a prison reference (usually). This internal version assumes no 2638191673Sjamie * mutexes are held, except perhaps the prison itself. If there are no more 2639191673Sjamie * references, release and delist the prison. On completion, the prison lock 2640191673Sjamie * and the allprison lock are both unlocked. 2641191673Sjamie */ 2642191673Sjamiestatic void 2643191673Sjamieprison_deref(struct prison *pr, int flags) 2644191673Sjamie{ 2645192895Sjamie struct prison *ppr, *tpr; 2646298833Sjamie int ref, lasturef; 2647124882Srwatson 2648191673Sjamie if (!(flags & PD_LOCKED)) 2649191673Sjamie mtx_lock(&pr->pr_mtx); 2650225191Sjamie for (;;) { 2651225191Sjamie if (flags & PD_DEUREF) { 2652298833Sjamie KASSERT(pr->pr_uref > 0, 2653298833Sjamie ("prison_deref PD_DEUREF on a dead prison (jid=%d)", 2654298833Sjamie pr->pr_id)); 2655225191Sjamie pr->pr_uref--; 2656298833Sjamie lasturef = pr->pr_uref == 0; 2657298833Sjamie if (lasturef) 2658298833Sjamie pr->pr_ref++; 2659225191Sjamie KASSERT(prison0.pr_uref != 0, ("prison0 pr_uref=0")); 2660298833Sjamie } else 2661298833Sjamie lasturef = 0; 2662298833Sjamie if (flags & PD_DEREF) { 2663298833Sjamie KASSERT(pr->pr_ref > 0, 2664298833Sjamie ("prison_deref PD_DEREF on a dead prison (jid=%d)", 2665298833Sjamie pr->pr_id)); 2666298833Sjamie pr->pr_ref--; 2667192895Sjamie } 2668298833Sjamie ref = pr->pr_ref; 2669298833Sjamie mtx_unlock(&pr->pr_mtx); 2670298833Sjamie 2671298833Sjamie /* 2672298833Sjamie * Tell the modules if the last user reference was removed 2673298833Sjamie * (even it sticks around in dying state). 2674298833Sjamie */ 2675298833Sjamie if (lasturef) { 2676298833Sjamie if (!(flags & (PD_LIST_SLOCKED | PD_LIST_XLOCKED))) { 2677301907Sjamie sx_xlock(&allprison_lock); 2678301907Sjamie flags |= PD_LIST_XLOCKED; 2679298833Sjamie } 2680298833Sjamie (void)osd_jail_call(pr, PR_METHOD_REMOVE, NULL); 2681298833Sjamie mtx_lock(&pr->pr_mtx); 2682298833Sjamie ref = --pr->pr_ref; 2683298833Sjamie mtx_unlock(&pr->pr_mtx); 2684298833Sjamie } 2685298833Sjamie 2686192895Sjamie /* If the prison still has references, nothing else to do. */ 2687298833Sjamie if (ref > 0) { 2688192895Sjamie if (flags & PD_LIST_SLOCKED) 2689192895Sjamie sx_sunlock(&allprison_lock); 2690192895Sjamie else if (flags & PD_LIST_XLOCKED) 2691192895Sjamie sx_xunlock(&allprison_lock); 2692192895Sjamie return; 2693191673Sjamie } 2694191673Sjamie 2695192895Sjamie if (flags & PD_LIST_SLOCKED) { 2696192895Sjamie if (!sx_try_upgrade(&allprison_lock)) { 2697192895Sjamie sx_sunlock(&allprison_lock); 2698192895Sjamie sx_xlock(&allprison_lock); 2699192895Sjamie } 2700192895Sjamie } else if (!(flags & PD_LIST_XLOCKED)) 2701192895Sjamie sx_xlock(&allprison_lock); 2702168489Spjd 2703192895Sjamie TAILQ_REMOVE(&allprison, pr, pr_list); 2704192895Sjamie LIST_REMOVE(pr, pr_sibling); 2705192895Sjamie ppr = pr->pr_parent; 2706192895Sjamie for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent) 2707194762Sjamie tpr->pr_childcount--; 2708196592Sjamie sx_xunlock(&allprison_lock); 2709192895Sjamie 2710194251Sjamie#ifdef VIMAGE 2711196505Szec if (pr->pr_vnet != ppr->pr_vnet) 2712194251Sjamie vnet_destroy(pr->pr_vnet); 2713194251Sjamie#endif 2714241896Skib if (pr->pr_root != NULL) 2715192895Sjamie vrele(pr->pr_root); 2716192895Sjamie mtx_destroy(&pr->pr_mtx); 2717191673Sjamie#ifdef INET 2718192895Sjamie free(pr->pr_ip4, M_PRISON); 2719191673Sjamie#endif 2720185435Sbz#ifdef INET6 2721192895Sjamie free(pr->pr_ip6, M_PRISON); 2722185435Sbz#endif 2723192895Sjamie if (pr->pr_cpuset != NULL) 2724192895Sjamie cpuset_rel(pr->pr_cpuset); 2725192895Sjamie osd_jail_exit(pr); 2726221362Strasz#ifdef RACCT 2727284665Strasz if (racct_enable) 2728284665Strasz prison_racct_detach(pr); 2729220163Strasz#endif 2730192895Sjamie free(pr, M_PRISON); 2731192895Sjamie 2732192895Sjamie /* Removing a prison frees a reference on its parent. */ 2733192895Sjamie pr = ppr; 2734192895Sjamie mtx_lock(&pr->pr_mtx); 2735225191Sjamie flags = PD_DEREF | PD_DEUREF; 2736192895Sjamie } 2737124882Srwatson} 2738124882Srwatson 273972786Srwatsonvoid 2740185029Spjdprison_hold_locked(struct prison *pr) 274172786Srwatson{ 274272786Srwatson 2743185029Spjd mtx_assert(&pr->pr_mtx, MA_OWNED); 2744168489Spjd KASSERT(pr->pr_ref > 0, 2745191671Sjamie ("Trying to hold dead prison (jid=%d).", pr->pr_id)); 274672786Srwatson pr->pr_ref++; 2747185029Spjd} 2748185029Spjd 2749185029Spjdvoid 2750185029Spjdprison_hold(struct prison *pr) 2751185029Spjd{ 2752185029Spjd 2753185029Spjd mtx_lock(&pr->pr_mtx); 2754185029Spjd prison_hold_locked(pr); 275587275Srwatson mtx_unlock(&pr->pr_mtx); 275672786Srwatson} 275772786Srwatson 2758185435Sbzvoid 2759185435Sbzprison_proc_hold(struct prison *pr) 276087275Srwatson{ 276187275Srwatson 2762185435Sbz mtx_lock(&pr->pr_mtx); 2763191673Sjamie KASSERT(pr->pr_uref > 0, 2764191673Sjamie ("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id)); 2765191673Sjamie pr->pr_uref++; 2766185435Sbz mtx_unlock(&pr->pr_mtx); 276787275Srwatson} 276887275Srwatson 2769185435Sbzvoid 2770185435Sbzprison_proc_free(struct prison *pr) 2771185435Sbz{ 2772185435Sbz 2773185435Sbz mtx_lock(&pr->pr_mtx); 2774191673Sjamie KASSERT(pr->pr_uref > 0, 2775191673Sjamie ("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id)); 2776298833Sjamie if (pr->pr_uref > 1) 2777298833Sjamie pr->pr_uref--; 2778298833Sjamie else { 2779298833Sjamie /* 2780298833Sjamie * Don't remove the last user reference in this context, which 2781298833Sjamie * is expected to be a process that is not only locked, but 2782298833Sjamie * also half dead. 2783298833Sjamie */ 2784298833Sjamie pr->pr_ref++; 2785298833Sjamie mtx_unlock(&pr->pr_mtx); 2786298833Sjamie taskqueue_enqueue(taskqueue_thread, &pr->pr_task); 2787298833Sjamie return; 2788298833Sjamie } 2789298833Sjamie mtx_unlock(&pr->pr_mtx); 2790185435Sbz} 2791185435Sbz 2792185435Sbz 2793185435Sbz#ifdef INET 2794185435Sbz/* 2795192895Sjamie * Restrict a prison's IP address list with its parent's, possibly replacing 2796192895Sjamie * it. Return true if the replacement buffer was used (or would have been). 2797192895Sjamie */ 2798192895Sjamiestatic int 2799192895Sjamieprison_restrict_ip4(struct prison *pr, struct in_addr *newip4) 2800192895Sjamie{ 2801192895Sjamie int ii, ij, used; 2802192895Sjamie struct prison *ppr; 2803192895Sjamie 2804192895Sjamie ppr = pr->pr_parent; 2805192895Sjamie if (!(pr->pr_flags & PR_IP4_USER)) { 2806192895Sjamie /* This has no user settings, so just copy the parent's list. */ 2807192895Sjamie if (pr->pr_ip4s < ppr->pr_ip4s) { 2808192895Sjamie /* 2809192895Sjamie * There's no room for the parent's list. Use the 2810192895Sjamie * new list buffer, which is assumed to be big enough 2811192895Sjamie * (if it was passed). If there's no buffer, try to 2812192895Sjamie * allocate one. 2813192895Sjamie */ 2814192895Sjamie used = 1; 2815192895Sjamie if (newip4 == NULL) { 2816192895Sjamie newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4), 2817192895Sjamie M_PRISON, M_NOWAIT); 2818192895Sjamie if (newip4 != NULL) 2819192895Sjamie used = 0; 2820192895Sjamie } 2821192895Sjamie if (newip4 != NULL) { 2822192895Sjamie bcopy(ppr->pr_ip4, newip4, 2823192895Sjamie ppr->pr_ip4s * sizeof(*newip4)); 2824192895Sjamie free(pr->pr_ip4, M_PRISON); 2825192895Sjamie pr->pr_ip4 = newip4; 2826192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2827192895Sjamie } 2828192895Sjamie return (used); 2829192895Sjamie } 2830192895Sjamie pr->pr_ip4s = ppr->pr_ip4s; 2831192895Sjamie if (pr->pr_ip4s > 0) 2832192895Sjamie bcopy(ppr->pr_ip4, pr->pr_ip4, 2833192895Sjamie pr->pr_ip4s * sizeof(*newip4)); 2834192895Sjamie else if (pr->pr_ip4 != NULL) { 2835192895Sjamie free(pr->pr_ip4, M_PRISON); 2836192895Sjamie pr->pr_ip4 = NULL; 2837192895Sjamie } 2838195974Sjamie } else if (pr->pr_ip4s > 0) { 2839192895Sjamie /* Remove addresses that aren't in the parent. */ 2840192895Sjamie for (ij = 0; ij < ppr->pr_ip4s; ij++) 2841192895Sjamie if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr) 2842192895Sjamie break; 2843192895Sjamie if (ij < ppr->pr_ip4s) 2844192895Sjamie ii = 1; 2845192895Sjamie else { 2846192895Sjamie bcopy(pr->pr_ip4 + 1, pr->pr_ip4, 2847192895Sjamie --pr->pr_ip4s * sizeof(*pr->pr_ip4)); 2848192895Sjamie ii = 0; 2849192895Sjamie } 2850192895Sjamie for (ij = 1; ii < pr->pr_ip4s; ) { 2851192895Sjamie if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) { 2852192895Sjamie ii++; 2853192895Sjamie continue; 2854192895Sjamie } 2855192895Sjamie switch (ij >= ppr->pr_ip4s ? -1 : 2856192895Sjamie qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) { 2857192895Sjamie case -1: 2858192895Sjamie bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii, 2859192895Sjamie (--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4)); 2860192895Sjamie break; 2861192895Sjamie case 0: 2862192895Sjamie ii++; 2863192895Sjamie ij++; 2864192895Sjamie break; 2865192895Sjamie case 1: 2866192895Sjamie ij++; 2867192895Sjamie break; 2868192895Sjamie } 2869192895Sjamie } 2870192895Sjamie if (pr->pr_ip4s == 0) { 2871195870Sjamie pr->pr_flags |= PR_IP4_DISABLE; 2872192895Sjamie free(pr->pr_ip4, M_PRISON); 2873192895Sjamie pr->pr_ip4 = NULL; 2874192895Sjamie } 2875192895Sjamie } 2876192895Sjamie return (0); 2877192895Sjamie} 2878192895Sjamie 2879192895Sjamie/* 2880185435Sbz * Pass back primary IPv4 address of this jail. 2881185435Sbz * 2882192895Sjamie * If not restricted return success but do not alter the address. Caller has 2883192895Sjamie * to make sure to initialize it correctly (e.g. INADDR_ANY). 2884185435Sbz * 2885188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 2886188144Sjamie * Address returned in NBO. 2887185435Sbz */ 288846155Sphkint 2889187684Sbzprison_get_ip4(struct ucred *cred, struct in_addr *ia) 289046155Sphk{ 2891191673Sjamie struct prison *pr; 289246155Sphk 2893185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2894185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2895185435Sbz 2896192895Sjamie pr = cred->cr_prison; 2897192895Sjamie if (!(pr->pr_flags & PR_IP4)) 289846155Sphk return (0); 2899191673Sjamie mtx_lock(&pr->pr_mtx); 2900192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 2901192895Sjamie mtx_unlock(&pr->pr_mtx); 2902192895Sjamie return (0); 2903192895Sjamie } 2904191673Sjamie if (pr->pr_ip4 == NULL) { 2905191673Sjamie mtx_unlock(&pr->pr_mtx); 2906188144Sjamie return (EAFNOSUPPORT); 2907191673Sjamie } 2908185435Sbz 2909191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 2910191673Sjamie mtx_unlock(&pr->pr_mtx); 2911185435Sbz return (0); 2912185435Sbz} 2913185435Sbz 2914185435Sbz/* 2915202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 2916202468Sbz * We will return 0 if we should bypass source address selection in favour 2917202468Sbz * of the primary jail IPv4 address. Only in this case *ia will be updated and 2918202468Sbz * returned in NBO. 2919202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv4. 2920202468Sbz */ 2921202468Sbzint 2922202468Sbzprison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia) 2923202468Sbz{ 2924202468Sbz struct prison *pr; 2925202468Sbz struct in_addr lia; 2926202468Sbz int error; 2927202468Sbz 2928202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2929202468Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2930202468Sbz 2931202468Sbz if (!jailed(cred)) 2932202468Sbz return (1); 2933202468Sbz 2934202468Sbz pr = cred->cr_prison; 2935202468Sbz if (pr->pr_flags & PR_IP4_SADDRSEL) 2936202468Sbz return (1); 2937202468Sbz 2938202468Sbz lia.s_addr = INADDR_ANY; 2939202468Sbz error = prison_get_ip4(cred, &lia); 2940202468Sbz if (error) 2941202468Sbz return (error); 2942202468Sbz if (lia.s_addr == INADDR_ANY) 2943202468Sbz return (1); 2944202468Sbz 2945202468Sbz ia->s_addr = lia.s_addr; 2946202468Sbz return (0); 2947202468Sbz} 2948202468Sbz 2949202468Sbz/* 2950192895Sjamie * Return true if pr1 and pr2 have the same IPv4 address restrictions. 2951192895Sjamie */ 2952192895Sjamieint 2953192895Sjamieprison_equal_ip4(struct prison *pr1, struct prison *pr2) 2954192895Sjamie{ 2955192895Sjamie 2956192895Sjamie if (pr1 == pr2) 2957192895Sjamie return (1); 2958192895Sjamie 2959192895Sjamie /* 2960195974Sjamie * No need to lock since the PR_IP4_USER flag can't be altered for 2961195974Sjamie * existing prisons. 2962192895Sjamie */ 2963195945Sjamie while (pr1 != &prison0 && 2964195945Sjamie#ifdef VIMAGE 2965195945Sjamie !(pr1->pr_flags & PR_VNET) && 2966195945Sjamie#endif 2967195945Sjamie !(pr1->pr_flags & PR_IP4_USER)) 2968192895Sjamie pr1 = pr1->pr_parent; 2969195945Sjamie while (pr2 != &prison0 && 2970195945Sjamie#ifdef VIMAGE 2971195945Sjamie !(pr2->pr_flags & PR_VNET) && 2972195945Sjamie#endif 2973195945Sjamie !(pr2->pr_flags & PR_IP4_USER)) 2974192895Sjamie pr2 = pr2->pr_parent; 2975192895Sjamie return (pr1 == pr2); 2976192895Sjamie} 2977192895Sjamie 2978192895Sjamie/* 2979185435Sbz * Make sure our (source) address is set to something meaningful to this 2980185435Sbz * jail. 2981185435Sbz * 2982192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 2983192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 2984192895Sjamie * doesn't allow IPv4. Address passed in in NBO and returned in NBO. 2985185435Sbz */ 2986185435Sbzint 2987185435Sbzprison_local_ip4(struct ucred *cred, struct in_addr *ia) 2988185435Sbz{ 2989191673Sjamie struct prison *pr; 2990185435Sbz struct in_addr ia0; 2991191673Sjamie int error; 2992185435Sbz 2993185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 2994185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 2995185435Sbz 2996192895Sjamie pr = cred->cr_prison; 2997192895Sjamie if (!(pr->pr_flags & PR_IP4)) 299846155Sphk return (0); 2999191673Sjamie mtx_lock(&pr->pr_mtx); 3000192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 3001192895Sjamie mtx_unlock(&pr->pr_mtx); 3002192895Sjamie return (0); 3003192895Sjamie } 3004191673Sjamie if (pr->pr_ip4 == NULL) { 3005191673Sjamie mtx_unlock(&pr->pr_mtx); 3006188144Sjamie return (EAFNOSUPPORT); 3007191673Sjamie } 3008185435Sbz 3009185435Sbz ia0.s_addr = ntohl(ia->s_addr); 3010185435Sbz if (ia0.s_addr == INADDR_LOOPBACK) { 3011191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 3012191673Sjamie mtx_unlock(&pr->pr_mtx); 3013185435Sbz return (0); 301446155Sphk } 3015185435Sbz 3016188144Sjamie if (ia0.s_addr == INADDR_ANY) { 3017188144Sjamie /* 3018188144Sjamie * In case there is only 1 IPv4 address, bind directly. 3019188144Sjamie */ 3020191673Sjamie if (pr->pr_ip4s == 1) 3021191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 3022191673Sjamie mtx_unlock(&pr->pr_mtx); 3023185435Sbz return (0); 3024185435Sbz } 3025185435Sbz 3026191673Sjamie error = _prison_check_ip4(pr, ia); 3027191673Sjamie mtx_unlock(&pr->pr_mtx); 3028191673Sjamie return (error); 3029185435Sbz} 3030185435Sbz 3031185435Sbz/* 3032185435Sbz * Rewrite destination address in case we will connect to loopback address. 3033185435Sbz * 3034188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4. 3035188144Sjamie * Address passed in in NBO and returned in NBO. 3036185435Sbz */ 3037185435Sbzint 3038185435Sbzprison_remote_ip4(struct ucred *cred, struct in_addr *ia) 3039185435Sbz{ 3040191673Sjamie struct prison *pr; 3041185435Sbz 3042185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3043185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 3044185435Sbz 3045192895Sjamie pr = cred->cr_prison; 3046192895Sjamie if (!(pr->pr_flags & PR_IP4)) 3047185435Sbz return (0); 3048191673Sjamie mtx_lock(&pr->pr_mtx); 3049192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 3050192895Sjamie mtx_unlock(&pr->pr_mtx); 3051192895Sjamie return (0); 3052192895Sjamie } 3053191673Sjamie if (pr->pr_ip4 == NULL) { 3054191673Sjamie mtx_unlock(&pr->pr_mtx); 3055188144Sjamie return (EAFNOSUPPORT); 3056191673Sjamie } 3057188144Sjamie 3058185435Sbz if (ntohl(ia->s_addr) == INADDR_LOOPBACK) { 3059191673Sjamie ia->s_addr = pr->pr_ip4[0].s_addr; 3060191673Sjamie mtx_unlock(&pr->pr_mtx); 3061185435Sbz return (0); 3062185435Sbz } 3063185435Sbz 3064185435Sbz /* 3065185435Sbz * Return success because nothing had to be changed. 3066185435Sbz */ 3067191673Sjamie mtx_unlock(&pr->pr_mtx); 3068185435Sbz return (0); 3069185435Sbz} 3070185435Sbz 3071185435Sbz/* 3072188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3073185435Sbz * 3074192895Sjamie * Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail, 3075192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3076192895Sjamie * doesn't allow IPv4. Address passed in in NBO. 3077185435Sbz */ 3078185435Sbzstatic int 3079185435Sbz_prison_check_ip4(struct prison *pr, struct in_addr *ia) 3080185435Sbz{ 3081185435Sbz int i, a, z, d; 3082185435Sbz 3083185435Sbz /* 3084185435Sbz * Check the primary IP. 3085185435Sbz */ 3086185435Sbz if (pr->pr_ip4[0].s_addr == ia->s_addr) 3087188144Sjamie return (0); 3088185435Sbz 3089185435Sbz /* 3090185435Sbz * All the other IPs are sorted so we can do a binary search. 3091185435Sbz */ 3092185435Sbz a = 0; 3093185435Sbz z = pr->pr_ip4s - 2; 3094185435Sbz while (a <= z) { 3095185435Sbz i = (a + z) / 2; 3096185435Sbz d = qcmp_v4(&pr->pr_ip4[i+1], ia); 3097185435Sbz if (d > 0) 3098185435Sbz z = i - 1; 3099185435Sbz else if (d < 0) 3100185435Sbz a = i + 1; 310181114Srwatson else 3102188144Sjamie return (0); 3103185435Sbz } 3104188144Sjamie 3105188144Sjamie return (EADDRNOTAVAIL); 3106185435Sbz} 3107185435Sbz 3108185435Sbzint 3109185435Sbzprison_check_ip4(struct ucred *cred, struct in_addr *ia) 3110185435Sbz{ 3111191673Sjamie struct prison *pr; 3112191673Sjamie int error; 3113185435Sbz 3114185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3115185435Sbz KASSERT(ia != NULL, ("%s: ia is NULL", __func__)); 3116185435Sbz 3117192895Sjamie pr = cred->cr_prison; 3118192895Sjamie if (!(pr->pr_flags & PR_IP4)) 3119188144Sjamie return (0); 3120191673Sjamie mtx_lock(&pr->pr_mtx); 3121192895Sjamie if (!(pr->pr_flags & PR_IP4)) { 3122192895Sjamie mtx_unlock(&pr->pr_mtx); 3123192895Sjamie return (0); 3124192895Sjamie } 3125191673Sjamie if (pr->pr_ip4 == NULL) { 3126191673Sjamie mtx_unlock(&pr->pr_mtx); 3127188144Sjamie return (EAFNOSUPPORT); 3128191673Sjamie } 3129185435Sbz 3130191673Sjamie error = _prison_check_ip4(pr, ia); 3131191673Sjamie mtx_unlock(&pr->pr_mtx); 3132191673Sjamie return (error); 3133185435Sbz} 3134185435Sbz#endif 3135185435Sbz 3136185435Sbz#ifdef INET6 3137192895Sjamiestatic int 3138192895Sjamieprison_restrict_ip6(struct prison *pr, struct in6_addr *newip6) 3139192895Sjamie{ 3140192895Sjamie int ii, ij, used; 3141192895Sjamie struct prison *ppr; 3142192895Sjamie 3143192895Sjamie ppr = pr->pr_parent; 3144192895Sjamie if (!(pr->pr_flags & PR_IP6_USER)) { 3145192895Sjamie /* This has no user settings, so just copy the parent's list. */ 3146192895Sjamie if (pr->pr_ip6s < ppr->pr_ip6s) { 3147192895Sjamie /* 3148192895Sjamie * There's no room for the parent's list. Use the 3149192895Sjamie * new list buffer, which is assumed to be big enough 3150192895Sjamie * (if it was passed). If there's no buffer, try to 3151192895Sjamie * allocate one. 3152192895Sjamie */ 3153192895Sjamie used = 1; 3154192895Sjamie if (newip6 == NULL) { 3155192895Sjamie newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6), 3156192895Sjamie M_PRISON, M_NOWAIT); 3157192895Sjamie if (newip6 != NULL) 3158192895Sjamie used = 0; 3159192895Sjamie } 3160192895Sjamie if (newip6 != NULL) { 3161192895Sjamie bcopy(ppr->pr_ip6, newip6, 3162192895Sjamie ppr->pr_ip6s * sizeof(*newip6)); 3163192895Sjamie free(pr->pr_ip6, M_PRISON); 3164192895Sjamie pr->pr_ip6 = newip6; 3165192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 3166192895Sjamie } 3167192895Sjamie return (used); 3168192895Sjamie } 3169192895Sjamie pr->pr_ip6s = ppr->pr_ip6s; 3170192895Sjamie if (pr->pr_ip6s > 0) 3171192895Sjamie bcopy(ppr->pr_ip6, pr->pr_ip6, 3172192895Sjamie pr->pr_ip6s * sizeof(*newip6)); 3173192895Sjamie else if (pr->pr_ip6 != NULL) { 3174192895Sjamie free(pr->pr_ip6, M_PRISON); 3175192895Sjamie pr->pr_ip6 = NULL; 3176192895Sjamie } 3177195974Sjamie } else if (pr->pr_ip6s > 0) { 3178192895Sjamie /* Remove addresses that aren't in the parent. */ 3179192895Sjamie for (ij = 0; ij < ppr->pr_ip6s; ij++) 3180192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], 3181192895Sjamie &ppr->pr_ip6[ij])) 3182192895Sjamie break; 3183192895Sjamie if (ij < ppr->pr_ip6s) 3184192895Sjamie ii = 1; 3185192895Sjamie else { 3186192895Sjamie bcopy(pr->pr_ip6 + 1, pr->pr_ip6, 3187192895Sjamie --pr->pr_ip6s * sizeof(*pr->pr_ip6)); 3188192895Sjamie ii = 0; 3189192895Sjamie } 3190192895Sjamie for (ij = 1; ii < pr->pr_ip6s; ) { 3191192895Sjamie if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii], 3192192895Sjamie &ppr->pr_ip6[0])) { 3193192895Sjamie ii++; 3194192895Sjamie continue; 3195192895Sjamie } 3196259847Sae switch (ij >= ppr->pr_ip6s ? -1 : 3197192895Sjamie qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) { 3198192895Sjamie case -1: 3199192895Sjamie bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii, 3200192895Sjamie (--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6)); 3201192895Sjamie break; 3202192895Sjamie case 0: 3203192895Sjamie ii++; 3204192895Sjamie ij++; 3205192895Sjamie break; 3206192895Sjamie case 1: 3207192895Sjamie ij++; 3208192895Sjamie break; 3209192895Sjamie } 3210192895Sjamie } 3211192895Sjamie if (pr->pr_ip6s == 0) { 3212195870Sjamie pr->pr_flags |= PR_IP6_DISABLE; 3213192895Sjamie free(pr->pr_ip6, M_PRISON); 3214192895Sjamie pr->pr_ip6 = NULL; 3215192895Sjamie } 3216192895Sjamie } 3217192895Sjamie return 0; 3218192895Sjamie} 3219192895Sjamie 3220185435Sbz/* 3221185435Sbz * Pass back primary IPv6 address for this jail. 3222185435Sbz * 3223192895Sjamie * If not restricted return success but do not alter the address. Caller has 3224192895Sjamie * to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT). 3225185435Sbz * 3226188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3227185435Sbz */ 3228185435Sbzint 3229187684Sbzprison_get_ip6(struct ucred *cred, struct in6_addr *ia6) 3230185435Sbz{ 3231191673Sjamie struct prison *pr; 3232185435Sbz 3233185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3234185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3235185435Sbz 3236192895Sjamie pr = cred->cr_prison; 3237192895Sjamie if (!(pr->pr_flags & PR_IP6)) 323881114Srwatson return (0); 3239191673Sjamie mtx_lock(&pr->pr_mtx); 3240192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3241192895Sjamie mtx_unlock(&pr->pr_mtx); 3242192895Sjamie return (0); 3243192895Sjamie } 3244191673Sjamie if (pr->pr_ip6 == NULL) { 3245191673Sjamie mtx_unlock(&pr->pr_mtx); 3246188144Sjamie return (EAFNOSUPPORT); 3247191673Sjamie } 3248188144Sjamie 3249191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3250191673Sjamie mtx_unlock(&pr->pr_mtx); 3251185435Sbz return (0); 3252185435Sbz} 3253185435Sbz 3254185435Sbz/* 3255202468Sbz * Return 1 if we should do proper source address selection or are not jailed. 3256202468Sbz * We will return 0 if we should bypass source address selection in favour 3257202468Sbz * of the primary jail IPv6 address. Only in this case *ia will be updated and 3258202468Sbz * returned in NBO. 3259202468Sbz * Return EAFNOSUPPORT, in case this jail does not allow IPv6. 3260202468Sbz */ 3261202468Sbzint 3262202468Sbzprison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6) 3263202468Sbz{ 3264202468Sbz struct prison *pr; 3265202468Sbz struct in6_addr lia6; 3266202468Sbz int error; 3267202468Sbz 3268202468Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3269202468Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3270202468Sbz 3271202468Sbz if (!jailed(cred)) 3272202468Sbz return (1); 3273202468Sbz 3274202468Sbz pr = cred->cr_prison; 3275202468Sbz if (pr->pr_flags & PR_IP6_SADDRSEL) 3276202468Sbz return (1); 3277202468Sbz 3278202468Sbz lia6 = in6addr_any; 3279202468Sbz error = prison_get_ip6(cred, &lia6); 3280202468Sbz if (error) 3281202468Sbz return (error); 3282202468Sbz if (IN6_IS_ADDR_UNSPECIFIED(&lia6)) 3283202468Sbz return (1); 3284202468Sbz 3285202468Sbz bcopy(&lia6, ia6, sizeof(struct in6_addr)); 3286202468Sbz return (0); 3287202468Sbz} 3288202468Sbz 3289202468Sbz/* 3290192895Sjamie * Return true if pr1 and pr2 have the same IPv6 address restrictions. 3291192895Sjamie */ 3292192895Sjamieint 3293192895Sjamieprison_equal_ip6(struct prison *pr1, struct prison *pr2) 3294192895Sjamie{ 3295192895Sjamie 3296192895Sjamie if (pr1 == pr2) 3297192895Sjamie return (1); 3298192895Sjamie 3299195945Sjamie while (pr1 != &prison0 && 3300195945Sjamie#ifdef VIMAGE 3301195945Sjamie !(pr1->pr_flags & PR_VNET) && 3302195945Sjamie#endif 3303195945Sjamie !(pr1->pr_flags & PR_IP6_USER)) 3304192895Sjamie pr1 = pr1->pr_parent; 3305195945Sjamie while (pr2 != &prison0 && 3306195945Sjamie#ifdef VIMAGE 3307195945Sjamie !(pr2->pr_flags & PR_VNET) && 3308195945Sjamie#endif 3309195945Sjamie !(pr2->pr_flags & PR_IP6_USER)) 3310192895Sjamie pr2 = pr2->pr_parent; 3311192895Sjamie return (pr1 == pr2); 3312192895Sjamie} 3313192895Sjamie 3314192895Sjamie/* 3315185435Sbz * Make sure our (source) address is set to something meaningful to this jail. 3316185435Sbz * 3317185435Sbz * v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0) 3318185435Sbz * when needed while binding. 3319185435Sbz * 3320192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3321192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3322192895Sjamie * doesn't allow IPv6. 3323185435Sbz */ 3324185435Sbzint 3325185435Sbzprison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only) 3326185435Sbz{ 3327191673Sjamie struct prison *pr; 3328191673Sjamie int error; 3329185435Sbz 3330185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3331185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3332185435Sbz 3333192895Sjamie pr = cred->cr_prison; 3334192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3335185435Sbz return (0); 3336191673Sjamie mtx_lock(&pr->pr_mtx); 3337192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3338192895Sjamie mtx_unlock(&pr->pr_mtx); 3339192895Sjamie return (0); 3340192895Sjamie } 3341191673Sjamie if (pr->pr_ip6 == NULL) { 3342191673Sjamie mtx_unlock(&pr->pr_mtx); 3343188144Sjamie return (EAFNOSUPPORT); 3344191673Sjamie } 3345188144Sjamie 3346185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3347191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3348191673Sjamie mtx_unlock(&pr->pr_mtx); 3349185435Sbz return (0); 335081114Srwatson } 3351185435Sbz 3352188144Sjamie if (IN6_IS_ADDR_UNSPECIFIED(ia6)) { 3353188144Sjamie /* 3354188144Sjamie * In case there is only 1 IPv6 address, and v6only is true, 3355188144Sjamie * then bind directly. 3356188144Sjamie */ 3357191673Sjamie if (v6only != 0 && pr->pr_ip6s == 1) 3358191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3359191673Sjamie mtx_unlock(&pr->pr_mtx); 3360185435Sbz return (0); 3361185435Sbz } 3362188144Sjamie 3363191673Sjamie error = _prison_check_ip6(pr, ia6); 3364191673Sjamie mtx_unlock(&pr->pr_mtx); 3365191673Sjamie return (error); 3366185435Sbz} 3367185435Sbz 3368185435Sbz/* 3369185435Sbz * Rewrite destination address in case we will connect to loopback address. 3370185435Sbz * 3371188144Sjamie * Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6. 3372185435Sbz */ 3373185435Sbzint 3374185435Sbzprison_remote_ip6(struct ucred *cred, struct in6_addr *ia6) 3375185435Sbz{ 3376191673Sjamie struct prison *pr; 3377185435Sbz 3378185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3379185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3380185435Sbz 3381192895Sjamie pr = cred->cr_prison; 3382192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3383185435Sbz return (0); 3384191673Sjamie mtx_lock(&pr->pr_mtx); 3385192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3386192895Sjamie mtx_unlock(&pr->pr_mtx); 3387192895Sjamie return (0); 3388192895Sjamie } 3389191673Sjamie if (pr->pr_ip6 == NULL) { 3390191673Sjamie mtx_unlock(&pr->pr_mtx); 3391188144Sjamie return (EAFNOSUPPORT); 3392191673Sjamie } 3393188144Sjamie 3394185435Sbz if (IN6_IS_ADDR_LOOPBACK(ia6)) { 3395191673Sjamie bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr)); 3396191673Sjamie mtx_unlock(&pr->pr_mtx); 3397185435Sbz return (0); 3398185435Sbz } 3399185435Sbz 3400185435Sbz /* 3401185435Sbz * Return success because nothing had to be changed. 3402185435Sbz */ 3403191673Sjamie mtx_unlock(&pr->pr_mtx); 340446155Sphk return (0); 340546155Sphk} 340646155Sphk 3407185435Sbz/* 3408188144Sjamie * Check if given address belongs to the jail referenced by cred/prison. 3409185435Sbz * 3410192895Sjamie * Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail, 3411192895Sjamie * EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail 3412192895Sjamie * doesn't allow IPv6. 3413185435Sbz */ 3414185435Sbzstatic int 3415185435Sbz_prison_check_ip6(struct prison *pr, struct in6_addr *ia6) 341646155Sphk{ 3417185435Sbz int i, a, z, d; 341846155Sphk 3419185435Sbz /* 3420185435Sbz * Check the primary IP. 3421185435Sbz */ 3422185435Sbz if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6)) 3423188144Sjamie return (0); 3424185435Sbz 3425185435Sbz /* 3426185435Sbz * All the other IPs are sorted so we can do a binary search. 3427185435Sbz */ 3428185435Sbz a = 0; 3429185435Sbz z = pr->pr_ip6s - 2; 3430185435Sbz while (a <= z) { 3431185435Sbz i = (a + z) / 2; 3432185435Sbz d = qcmp_v6(&pr->pr_ip6[i+1], ia6); 3433185435Sbz if (d > 0) 3434185435Sbz z = i - 1; 3435185435Sbz else if (d < 0) 3436185435Sbz a = i + 1; 343746155Sphk else 3438188144Sjamie return (0); 343946155Sphk } 3440188144Sjamie 3441188144Sjamie return (EADDRNOTAVAIL); 344246155Sphk} 344346155Sphk 344446155Sphkint 3445185435Sbzprison_check_ip6(struct ucred *cred, struct in6_addr *ia6) 3446185435Sbz{ 3447191673Sjamie struct prison *pr; 3448191673Sjamie int error; 3449185435Sbz 3450185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3451185435Sbz KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__)); 3452185435Sbz 3453192895Sjamie pr = cred->cr_prison; 3454192895Sjamie if (!(pr->pr_flags & PR_IP6)) 3455188144Sjamie return (0); 3456191673Sjamie mtx_lock(&pr->pr_mtx); 3457192895Sjamie if (!(pr->pr_flags & PR_IP6)) { 3458192895Sjamie mtx_unlock(&pr->pr_mtx); 3459192895Sjamie return (0); 3460192895Sjamie } 3461191673Sjamie if (pr->pr_ip6 == NULL) { 3462191673Sjamie mtx_unlock(&pr->pr_mtx); 3463188144Sjamie return (EAFNOSUPPORT); 3464191673Sjamie } 3465185435Sbz 3466191673Sjamie error = _prison_check_ip6(pr, ia6); 3467191673Sjamie mtx_unlock(&pr->pr_mtx); 3468191673Sjamie return (error); 3469185435Sbz} 3470185435Sbz#endif 3471185435Sbz 3472185435Sbz/* 3473188146Sjamie * Check if a jail supports the given address family. 3474188146Sjamie * 3475188146Sjamie * Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT 3476188146Sjamie * if not. 3477188146Sjamie */ 3478188146Sjamieint 3479188146Sjamieprison_check_af(struct ucred *cred, int af) 3480188146Sjamie{ 3481192895Sjamie struct prison *pr; 3482188146Sjamie int error; 3483188146Sjamie 3484188146Sjamie KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3485188146Sjamie 3486192895Sjamie pr = cred->cr_prison; 3487194923Sjamie#ifdef VIMAGE 3488194915Sjamie /* Prisons with their own network stack are not limited. */ 3489200473Sbz if (prison_owns_vnet(cred)) 3490194915Sjamie return (0); 3491194923Sjamie#endif 3492194915Sjamie 3493188146Sjamie error = 0; 3494188146Sjamie switch (af) 3495188146Sjamie { 3496188146Sjamie#ifdef INET 3497188146Sjamie case AF_INET: 3498192895Sjamie if (pr->pr_flags & PR_IP4) 3499192895Sjamie { 3500192895Sjamie mtx_lock(&pr->pr_mtx); 3501192895Sjamie if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL) 3502192895Sjamie error = EAFNOSUPPORT; 3503192895Sjamie mtx_unlock(&pr->pr_mtx); 3504192895Sjamie } 3505188146Sjamie break; 3506188146Sjamie#endif 3507188146Sjamie#ifdef INET6 3508188146Sjamie case AF_INET6: 3509192895Sjamie if (pr->pr_flags & PR_IP6) 3510192895Sjamie { 3511192895Sjamie mtx_lock(&pr->pr_mtx); 3512192895Sjamie if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL) 3513192895Sjamie error = EAFNOSUPPORT; 3514192895Sjamie mtx_unlock(&pr->pr_mtx); 3515192895Sjamie } 3516188146Sjamie break; 3517188146Sjamie#endif 3518188146Sjamie case AF_LOCAL: 3519188146Sjamie case AF_ROUTE: 3520188146Sjamie break; 3521188146Sjamie default: 3522192895Sjamie if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF)) 3523188146Sjamie error = EAFNOSUPPORT; 3524188146Sjamie } 3525188146Sjamie return (error); 3526188146Sjamie} 3527188146Sjamie 3528188146Sjamie/* 3529185435Sbz * Check if given address belongs to the jail referenced by cred (wrapper to 3530185435Sbz * prison_check_ip[46]). 3531185435Sbz * 3532192895Sjamie * Returns 0 if jail doesn't restrict the address family or if address belongs 3533192895Sjamie * to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if 3534192895Sjamie * the jail doesn't allow the address family. IPv4 Address passed in in NBO. 3535185435Sbz */ 3536185435Sbzint 353772786Srwatsonprison_if(struct ucred *cred, struct sockaddr *sa) 353846155Sphk{ 3539185435Sbz#ifdef INET 3540114168Smike struct sockaddr_in *sai; 3541185435Sbz#endif 3542185435Sbz#ifdef INET6 3543185435Sbz struct sockaddr_in6 *sai6; 3544185435Sbz#endif 3545188144Sjamie int error; 354646155Sphk 3547185435Sbz KASSERT(cred != NULL, ("%s: cred is NULL", __func__)); 3548185435Sbz KASSERT(sa != NULL, ("%s: sa is NULL", __func__)); 3549185435Sbz 3550200473Sbz#ifdef VIMAGE 3551200473Sbz if (prison_owns_vnet(cred)) 3552200473Sbz return (0); 3553200473Sbz#endif 3554200473Sbz 3555188144Sjamie error = 0; 3556188144Sjamie switch (sa->sa_family) 3557185435Sbz { 3558185435Sbz#ifdef INET 3559185435Sbz case AF_INET: 3560185435Sbz sai = (struct sockaddr_in *)sa; 3561188144Sjamie error = prison_check_ip4(cred, &sai->sin_addr); 3562185435Sbz break; 3563185435Sbz#endif 3564185435Sbz#ifdef INET6 3565185435Sbz case AF_INET6: 3566185435Sbz sai6 = (struct sockaddr_in6 *)sa; 3567188144Sjamie error = prison_check_ip6(cred, &sai6->sin6_addr); 3568185435Sbz break; 3569185435Sbz#endif 3570185435Sbz default: 3571192895Sjamie if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF)) 3572188144Sjamie error = EAFNOSUPPORT; 3573185435Sbz } 3574188144Sjamie return (error); 357546155Sphk} 357672786Srwatson 357772786Srwatson/* 357872786Srwatson * Return 0 if jails permit p1 to frob p2, otherwise ESRCH. 357972786Srwatson */ 358072786Srwatsonint 3581114168Smikeprison_check(struct ucred *cred1, struct ucred *cred2) 358272786Srwatson{ 358372786Srwatson 3584192895Sjamie return ((cred1->cr_prison == cred2->cr_prison || 3585192895Sjamie prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH); 3586192895Sjamie} 358772786Srwatson 3588192895Sjamie/* 3589192895Sjamie * Return 1 if p2 is a child of p1, otherwise 0. 3590192895Sjamie */ 3591192895Sjamieint 3592192895Sjamieprison_ischild(struct prison *pr1, struct prison *pr2) 3593192895Sjamie{ 3594192895Sjamie 3595192895Sjamie for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent) 3596192895Sjamie if (pr1 == pr2) 3597192895Sjamie return (1); 359872786Srwatson return (0); 359972786Srwatson} 360072786Srwatson 360172786Srwatson/* 360272786Srwatson * Return 1 if the passed credential is in a jail, otherwise 0. 360372786Srwatson */ 360472786Srwatsonint 3605114168Smikejailed(struct ucred *cred) 360672786Srwatson{ 360772786Srwatson 3608192895Sjamie return (cred->cr_prison != &prison0); 360972786Srwatson} 361091384Srobert 361191384Srobert/* 3612200473Sbz * Return 1 if the passed credential is in a jail and that jail does not 3613200473Sbz * have its own virtual network stack, otherwise 0. 3614200473Sbz */ 3615200473Sbzint 3616200473Sbzjailed_without_vnet(struct ucred *cred) 3617200473Sbz{ 3618200473Sbz 3619200473Sbz if (!jailed(cred)) 3620200473Sbz return (0); 3621200473Sbz#ifdef VIMAGE 3622200473Sbz if (prison_owns_vnet(cred)) 3623200473Sbz return (0); 3624200473Sbz#endif 3625200473Sbz 3626200473Sbz return (1); 3627200473Sbz} 3628200473Sbz 3629200473Sbz/* 3630194090Sjamie * Return the correct hostname (domainname, et al) for the passed credential. 363191384Srobert */ 363291391Srobertvoid 3633114168Smikegetcredhostname(struct ucred *cred, char *buf, size_t size) 363491384Srobert{ 3635193066Sjamie struct prison *pr; 363691384Srobert 3637194090Sjamie /* 3638194090Sjamie * A NULL credential can be used to shortcut to the physical 3639194090Sjamie * system's hostname. 3640194090Sjamie */ 3641193066Sjamie pr = (cred != NULL) ? cred->cr_prison : &prison0; 3642193066Sjamie mtx_lock(&pr->pr_mtx); 3643194118Sjamie strlcpy(buf, pr->pr_hostname, size); 3644193066Sjamie mtx_unlock(&pr->pr_mtx); 364591384Srobert} 3646113275Smike 3647194090Sjamievoid 3648194090Sjamiegetcreddomainname(struct ucred *cred, char *buf, size_t size) 3649194090Sjamie{ 3650194090Sjamie 3651194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3652194118Sjamie strlcpy(buf, cred->cr_prison->pr_domainname, size); 3653194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3654194090Sjamie} 3655194090Sjamie 3656194090Sjamievoid 3657194090Sjamiegetcredhostuuid(struct ucred *cred, char *buf, size_t size) 3658194090Sjamie{ 3659194090Sjamie 3660194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3661194118Sjamie strlcpy(buf, cred->cr_prison->pr_hostuuid, size); 3662194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3663194090Sjamie} 3664194090Sjamie 3665194090Sjamievoid 3666194090Sjamiegetcredhostid(struct ucred *cred, unsigned long *hostid) 3667194090Sjamie{ 3668194090Sjamie 3669194090Sjamie mtx_lock(&cred->cr_prison->pr_mtx); 3670194090Sjamie *hostid = cred->cr_prison->pr_hostid; 3671194090Sjamie mtx_unlock(&cred->cr_prison->pr_mtx); 3672194090Sjamie} 3673194090Sjamie 3674196176Sbz#ifdef VIMAGE 3675125804Srwatson/* 3676196176Sbz * Determine whether the prison represented by cred owns 3677196176Sbz * its vnet rather than having it inherited. 3678196176Sbz * 3679196176Sbz * Returns 1 in case the prison owns the vnet, 0 otherwise. 3680196176Sbz */ 3681196176Sbzint 3682196176Sbzprison_owns_vnet(struct ucred *cred) 3683196176Sbz{ 3684196176Sbz 3685196176Sbz /* 3686196176Sbz * vnets cannot be added/removed after jail creation, 3687196176Sbz * so no need to lock here. 3688196176Sbz */ 3689196176Sbz return (cred->cr_prison->pr_flags & PR_VNET ? 1 : 0); 3690196176Sbz} 3691196176Sbz#endif 3692196176Sbz 3693196176Sbz/* 3694147185Spjd * Determine whether the subject represented by cred can "see" 3695147185Spjd * status of a mount point. 3696147185Spjd * Returns: 0 for permitted, ENOENT otherwise. 3697147185Spjd * XXX: This function should be called cr_canseemount() and should be 3698147185Spjd * placed in kern_prot.c. 3699125804Srwatson */ 3700125804Srwatsonint 3701147185Spjdprison_canseemount(struct ucred *cred, struct mount *mp) 3702125804Srwatson{ 3703147185Spjd struct prison *pr; 3704147185Spjd struct statfs *sp; 3705147185Spjd size_t len; 3706125804Srwatson 3707192895Sjamie pr = cred->cr_prison; 3708192895Sjamie if (pr->pr_enforce_statfs == 0) 3709147185Spjd return (0); 3710147185Spjd if (pr->pr_root->v_mount == mp) 3711147185Spjd return (0); 3712192895Sjamie if (pr->pr_enforce_statfs == 2) 3713147185Spjd return (ENOENT); 3714147185Spjd /* 3715147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3716147185Spjd * all mount-points from inside a jail. 3717147185Spjd * This is ugly check, but this is the only situation when jail's 3718147185Spjd * directory ends with '/'. 3719147185Spjd */ 3720147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3721147185Spjd return (0); 3722147185Spjd len = strlen(pr->pr_path); 3723147185Spjd sp = &mp->mnt_stat; 3724147185Spjd if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0) 3725147185Spjd return (ENOENT); 3726147185Spjd /* 3727147185Spjd * Be sure that we don't have situation where jail's root directory 3728147185Spjd * is "/some/path" and mount point is "/some/pathpath". 3729147185Spjd */ 3730147185Spjd if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/') 3731147185Spjd return (ENOENT); 3732147185Spjd return (0); 3733147185Spjd} 3734147185Spjd 3735147185Spjdvoid 3736147185Spjdprison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp) 3737147185Spjd{ 3738147185Spjd char jpath[MAXPATHLEN]; 3739147185Spjd struct prison *pr; 3740147185Spjd size_t len; 3741147185Spjd 3742192895Sjamie pr = cred->cr_prison; 3743192895Sjamie if (pr->pr_enforce_statfs == 0) 3744147185Spjd return; 3745147185Spjd if (prison_canseemount(cred, mp) != 0) { 3746147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3747147185Spjd strlcpy(sp->f_mntonname, "[restricted]", 3748147185Spjd sizeof(sp->f_mntonname)); 3749147185Spjd return; 3750125804Srwatson } 3751147185Spjd if (pr->pr_root->v_mount == mp) { 3752147185Spjd /* 3753147185Spjd * Clear current buffer data, so we are sure nothing from 3754147185Spjd * the valid path left there. 3755147185Spjd */ 3756147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3757147185Spjd *sp->f_mntonname = '/'; 3758147185Spjd return; 3759147185Spjd } 3760147185Spjd /* 3761147185Spjd * If jail's chroot directory is set to "/" we should be able to see 3762147185Spjd * all mount-points from inside a jail. 3763147185Spjd */ 3764147185Spjd if (strcmp(pr->pr_path, "/") == 0) 3765147185Spjd return; 3766147185Spjd len = strlen(pr->pr_path); 3767147185Spjd strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath)); 3768147185Spjd /* 3769147185Spjd * Clear current buffer data, so we are sure nothing from 3770147185Spjd * the valid path left there. 3771147185Spjd */ 3772147185Spjd bzero(sp->f_mntonname, sizeof(sp->f_mntonname)); 3773147185Spjd if (*jpath == '\0') { 3774147185Spjd /* Should never happen. */ 3775147185Spjd *sp->f_mntonname = '/'; 3776147185Spjd } else { 3777147185Spjd strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname)); 3778147185Spjd } 3779125804Srwatson} 3780125804Srwatson 3781164032Srwatson/* 3782164032Srwatson * Check with permission for a specific privilege is granted within jail. We 3783164032Srwatson * have a specific list of accepted privileges; the rest are denied. 3784164032Srwatson */ 3785164032Srwatsonint 3786164032Srwatsonprison_priv_check(struct ucred *cred, int priv) 3787164032Srwatson{ 3788164032Srwatson 3789164032Srwatson if (!jailed(cred)) 3790164032Srwatson return (0); 3791164032Srwatson 3792194915Sjamie#ifdef VIMAGE 3793194915Sjamie /* 3794194915Sjamie * Privileges specific to prisons with a virtual network stack. 3795194915Sjamie * There might be a duplicate entry here in case the privilege 3796194915Sjamie * is only granted conditionally in the legacy jail case. 3797194915Sjamie */ 3798164032Srwatson switch (priv) { 3799194915Sjamie#ifdef notyet 3800194915Sjamie /* 3801194915Sjamie * NFS-specific privileges. 3802194915Sjamie */ 3803194915Sjamie case PRIV_NFS_DAEMON: 3804194915Sjamie case PRIV_NFS_LOCKD: 3805194915Sjamie#endif 3806194915Sjamie /* 3807194915Sjamie * Network stack privileges. 3808194915Sjamie */ 3809194915Sjamie case PRIV_NET_BRIDGE: 3810194915Sjamie case PRIV_NET_GRE: 3811194915Sjamie case PRIV_NET_BPF: 3812194915Sjamie case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */ 3813194915Sjamie case PRIV_NET_ROUTE: 3814194915Sjamie case PRIV_NET_TAP: 3815194915Sjamie case PRIV_NET_SETIFMTU: 3816194915Sjamie case PRIV_NET_SETIFFLAGS: 3817194915Sjamie case PRIV_NET_SETIFCAP: 3818203052Sdelphij case PRIV_NET_SETIFDESCR: 3819194915Sjamie case PRIV_NET_SETIFNAME : 3820194915Sjamie case PRIV_NET_SETIFMETRIC: 3821194915Sjamie case PRIV_NET_SETIFPHYS: 3822194915Sjamie case PRIV_NET_SETIFMAC: 3823194915Sjamie case PRIV_NET_ADDMULTI: 3824194915Sjamie case PRIV_NET_DELMULTI: 3825194915Sjamie case PRIV_NET_HWIOCTL: 3826194915Sjamie case PRIV_NET_SETLLADDR: 3827194915Sjamie case PRIV_NET_ADDIFGROUP: 3828194915Sjamie case PRIV_NET_DELIFGROUP: 3829194915Sjamie case PRIV_NET_IFCREATE: 3830194915Sjamie case PRIV_NET_IFDESTROY: 3831194915Sjamie case PRIV_NET_ADDIFADDR: 3832194915Sjamie case PRIV_NET_DELIFADDR: 3833194915Sjamie case PRIV_NET_LAGG: 3834194915Sjamie case PRIV_NET_GIF: 3835194915Sjamie case PRIV_NET_SETIFVNET: 3836223735Sbz case PRIV_NET_SETIFFIB: 3837164032Srwatson 3838164032Srwatson /* 3839194915Sjamie * 802.11-related privileges. 3840194915Sjamie */ 3841194915Sjamie case PRIV_NET80211_GETKEY: 3842194915Sjamie#ifdef notyet 3843194915Sjamie case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */ 3844194915Sjamie#endif 3845194915Sjamie 3846194915Sjamie#ifdef notyet 3847194915Sjamie /* 3848194915Sjamie * AppleTalk privileges. 3849194915Sjamie */ 3850194915Sjamie case PRIV_NETATALK_RESERVEDPORT: 3851194915Sjamie 3852194915Sjamie /* 3853194915Sjamie * ATM privileges. 3854194915Sjamie */ 3855194915Sjamie case PRIV_NETATM_CFG: 3856194915Sjamie case PRIV_NETATM_ADD: 3857194915Sjamie case PRIV_NETATM_DEL: 3858194915Sjamie case PRIV_NETATM_SET: 3859194915Sjamie 3860194915Sjamie /* 3861194915Sjamie * Bluetooth privileges. 3862194915Sjamie */ 3863194915Sjamie case PRIV_NETBLUETOOTH_RAW: 3864194915Sjamie#endif 3865194915Sjamie 3866194915Sjamie /* 3867194915Sjamie * Netgraph and netgraph module privileges. 3868194915Sjamie */ 3869194915Sjamie case PRIV_NETGRAPH_CONTROL: 3870194915Sjamie#ifdef notyet 3871194915Sjamie case PRIV_NETGRAPH_TTY: 3872194915Sjamie#endif 3873194915Sjamie 3874194915Sjamie /* 3875194915Sjamie * IPv4 and IPv6 privileges. 3876194915Sjamie */ 3877194915Sjamie case PRIV_NETINET_IPFW: 3878194915Sjamie case PRIV_NETINET_DIVERT: 3879194915Sjamie case PRIV_NETINET_PF: 3880194915Sjamie case PRIV_NETINET_DUMMYNET: 3881194915Sjamie case PRIV_NETINET_CARP: 3882194915Sjamie case PRIV_NETINET_MROUTE: 3883194915Sjamie case PRIV_NETINET_RAW: 3884194915Sjamie case PRIV_NETINET_ADDRCTRL6: 3885194915Sjamie case PRIV_NETINET_ND6: 3886194915Sjamie case PRIV_NETINET_SCOPE6: 3887194915Sjamie case PRIV_NETINET_ALIFETIME6: 3888194915Sjamie case PRIV_NETINET_IPSEC: 3889194915Sjamie case PRIV_NETINET_BINDANY: 3890194915Sjamie 3891194915Sjamie#ifdef notyet 3892194915Sjamie /* 3893194915Sjamie * IPX/SPX privileges. 3894194915Sjamie */ 3895194915Sjamie case PRIV_NETIPX_RESERVEDPORT: 3896194915Sjamie case PRIV_NETIPX_RAW: 3897194915Sjamie 3898194915Sjamie /* 3899194915Sjamie * NCP privileges. 3900194915Sjamie */ 3901194915Sjamie case PRIV_NETNCP: 3902194915Sjamie 3903194915Sjamie /* 3904194915Sjamie * SMB privileges. 3905194915Sjamie */ 3906194915Sjamie case PRIV_NETSMB: 3907194915Sjamie#endif 3908194915Sjamie 3909194915Sjamie /* 3910194915Sjamie * No default: or deny here. 3911194915Sjamie * In case of no permit fall through to next switch(). 3912194915Sjamie */ 3913194915Sjamie if (cred->cr_prison->pr_flags & PR_VNET) 3914194915Sjamie return (0); 3915194915Sjamie } 3916194915Sjamie#endif /* VIMAGE */ 3917194915Sjamie 3918194915Sjamie switch (priv) { 3919194915Sjamie 3920194915Sjamie /* 3921164032Srwatson * Allow ktrace privileges for root in jail. 3922164032Srwatson */ 3923164032Srwatson case PRIV_KTRACE: 3924164032Srwatson 3925166827Srwatson#if 0 3926164032Srwatson /* 3927164032Srwatson * Allow jailed processes to configure audit identity and 3928164032Srwatson * submit audit records (login, etc). In the future we may 3929164032Srwatson * want to further refine the relationship between audit and 3930164032Srwatson * jail. 3931164032Srwatson */ 3932164032Srwatson case PRIV_AUDIT_GETAUDIT: 3933164032Srwatson case PRIV_AUDIT_SETAUDIT: 3934164032Srwatson case PRIV_AUDIT_SUBMIT: 3935166827Srwatson#endif 3936164032Srwatson 3937164032Srwatson /* 3938164032Srwatson * Allow jailed processes to manipulate process UNIX 3939164032Srwatson * credentials in any way they see fit. 3940164032Srwatson */ 3941164032Srwatson case PRIV_CRED_SETUID: 3942164032Srwatson case PRIV_CRED_SETEUID: 3943164032Srwatson case PRIV_CRED_SETGID: 3944164032Srwatson case PRIV_CRED_SETEGID: 3945164032Srwatson case PRIV_CRED_SETGROUPS: 3946164032Srwatson case PRIV_CRED_SETREUID: 3947164032Srwatson case PRIV_CRED_SETREGID: 3948164032Srwatson case PRIV_CRED_SETRESUID: 3949164032Srwatson case PRIV_CRED_SETRESGID: 3950164032Srwatson 3951164032Srwatson /* 3952164032Srwatson * Jail implements visibility constraints already, so allow 3953164032Srwatson * jailed root to override uid/gid-based constraints. 3954164032Srwatson */ 3955164032Srwatson case PRIV_SEEOTHERGIDS: 3956164032Srwatson case PRIV_SEEOTHERUIDS: 3957164032Srwatson 3958164032Srwatson /* 3959164032Srwatson * Jail implements inter-process debugging limits already, so 3960164032Srwatson * allow jailed root various debugging privileges. 3961164032Srwatson */ 3962164032Srwatson case PRIV_DEBUG_DIFFCRED: 3963164032Srwatson case PRIV_DEBUG_SUGID: 3964164032Srwatson case PRIV_DEBUG_UNPRIV: 3965164032Srwatson 3966164032Srwatson /* 3967164032Srwatson * Allow jail to set various resource limits and login 3968164032Srwatson * properties, and for now, exceed process resource limits. 3969164032Srwatson */ 3970164032Srwatson case PRIV_PROC_LIMIT: 3971164032Srwatson case PRIV_PROC_SETLOGIN: 3972164032Srwatson case PRIV_PROC_SETRLIMIT: 3973164032Srwatson 3974164032Srwatson /* 3975164032Srwatson * System V and POSIX IPC privileges are granted in jail. 3976164032Srwatson */ 3977164032Srwatson case PRIV_IPC_READ: 3978164032Srwatson case PRIV_IPC_WRITE: 3979164032Srwatson case PRIV_IPC_ADMIN: 3980164032Srwatson case PRIV_IPC_MSGSIZE: 3981164032Srwatson case PRIV_MQ_ADMIN: 3982164032Srwatson 3983164032Srwatson /* 3984192895Sjamie * Jail operations within a jail work on child jails. 3985192895Sjamie */ 3986192895Sjamie case PRIV_JAIL_ATTACH: 3987192895Sjamie case PRIV_JAIL_SET: 3988192895Sjamie case PRIV_JAIL_REMOVE: 3989192895Sjamie 3990192895Sjamie /* 3991164032Srwatson * Jail implements its own inter-process limits, so allow 3992164032Srwatson * root processes in jail to change scheduling on other 3993164032Srwatson * processes in the same jail. Likewise for signalling. 3994164032Srwatson */ 3995164032Srwatson case PRIV_SCHED_DIFFCRED: 3996185435Sbz case PRIV_SCHED_CPUSET: 3997164032Srwatson case PRIV_SIGNAL_DIFFCRED: 3998164032Srwatson case PRIV_SIGNAL_SUGID: 3999164032Srwatson 4000164032Srwatson /* 4001164032Srwatson * Allow jailed processes to write to sysctls marked as jail 4002164032Srwatson * writable. 4003164032Srwatson */ 4004164032Srwatson case PRIV_SYSCTL_WRITEJAIL: 4005164032Srwatson 4006164032Srwatson /* 4007164032Srwatson * Allow root in jail to manage a variety of quota 4008166831Srwatson * properties. These should likely be conditional on a 4009166831Srwatson * configuration option. 4010164032Srwatson */ 4011166832Srwatson case PRIV_VFS_GETQUOTA: 4012166832Srwatson case PRIV_VFS_SETQUOTA: 4013164032Srwatson 4014164032Srwatson /* 4015164032Srwatson * Since Jail relies on chroot() to implement file system 4016164032Srwatson * protections, grant many VFS privileges to root in jail. 4017164032Srwatson * Be careful to exclude mount-related and NFS-related 4018164032Srwatson * privileges. 4019164032Srwatson */ 4020164032Srwatson case PRIV_VFS_READ: 4021164032Srwatson case PRIV_VFS_WRITE: 4022164032Srwatson case PRIV_VFS_ADMIN: 4023164032Srwatson case PRIV_VFS_EXEC: 4024164032Srwatson case PRIV_VFS_LOOKUP: 4025164032Srwatson case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */ 4026164032Srwatson case PRIV_VFS_CHFLAGS_DEV: 4027164032Srwatson case PRIV_VFS_CHOWN: 4028164032Srwatson case PRIV_VFS_CHROOT: 4029167152Spjd case PRIV_VFS_RETAINSUGID: 4030164032Srwatson case PRIV_VFS_FCHROOT: 4031164032Srwatson case PRIV_VFS_LINK: 4032164032Srwatson case PRIV_VFS_SETGID: 4033172860Srwatson case PRIV_VFS_STAT: 4034164032Srwatson case PRIV_VFS_STICKYFILE: 4035255316Sjamie 4036255316Sjamie /* 4037255316Sjamie * As in the non-jail case, non-root users are expected to be 4038255316Sjamie * able to read kernel/phyiscal memory (provided /dev/[k]mem 4039255316Sjamie * exists in the jail and they have permission to access it). 4040255316Sjamie */ 4041255316Sjamie case PRIV_KMEM_READ: 4042164032Srwatson return (0); 4043164032Srwatson 4044164032Srwatson /* 4045164032Srwatson * Depending on the global setting, allow privilege of 4046164032Srwatson * setting system flags. 4047164032Srwatson */ 4048164032Srwatson case PRIV_VFS_SYSFLAGS: 4049192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS) 4050164032Srwatson return (0); 4051164032Srwatson else 4052164032Srwatson return (EPERM); 4053164032Srwatson 4054164032Srwatson /* 4055168396Spjd * Depending on the global setting, allow privilege of 4056168396Spjd * mounting/unmounting file systems. 4057168396Spjd */ 4058168396Spjd case PRIV_VFS_MOUNT: 4059168396Spjd case PRIV_VFS_UNMOUNT: 4060168396Spjd case PRIV_VFS_MOUNT_NONUSER: 4061168699Spjd case PRIV_VFS_MOUNT_OWNER: 4062224615Smm if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT && 4063224615Smm cred->cr_prison->pr_enforce_statfs < 2) 4064168396Spjd return (0); 4065168396Spjd else 4066168396Spjd return (EPERM); 4067168396Spjd 4068168396Spjd /* 4069168591Srwatson * Allow jailed root to bind reserved ports and reuse in-use 4070168591Srwatson * ports. 4071164032Srwatson */ 4072164032Srwatson case PRIV_NETINET_RESERVEDPORT: 4073168591Srwatson case PRIV_NETINET_REUSEPORT: 4074164032Srwatson return (0); 4075164032Srwatson 4076164032Srwatson /* 4077302234Sbdrewery * Allow jailed root to set certain IPv4/6 (option) headers. 4078175630Sbz */ 4079175630Sbz case PRIV_NETINET_SETHDROPTS: 4080175630Sbz return (0); 4081175630Sbz 4082175630Sbz /* 4083164032Srwatson * Conditionally allow creating raw sockets in jail. 4084164032Srwatson */ 4085164032Srwatson case PRIV_NETINET_RAW: 4086192895Sjamie if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS) 4087164032Srwatson return (0); 4088164032Srwatson else 4089164032Srwatson return (EPERM); 4090164032Srwatson 4091164032Srwatson /* 4092164032Srwatson * Since jail implements its own visibility limits on netstat 4093164032Srwatson * sysctls, allow getcred. This allows identd to work in 4094164032Srwatson * jail. 4095164032Srwatson */ 4096164032Srwatson case PRIV_NETINET_GETCRED: 4097164032Srwatson return (0); 4098164032Srwatson 4099219304Strasz /* 4100219304Strasz * Allow jailed root to set loginclass. 4101219304Strasz */ 4102219304Strasz case PRIV_PROC_SETLOGINCLASS: 4103219304Strasz return (0); 4104219304Strasz 4105164032Srwatson default: 4106164032Srwatson /* 4107164032Srwatson * In all remaining cases, deny the privilege request. This 4108164032Srwatson * includes almost all network privileges, many system 4109164032Srwatson * configuration privileges. 4110164032Srwatson */ 4111164032Srwatson return (EPERM); 4112164032Srwatson } 4113164032Srwatson} 4114164032Srwatson 4115192895Sjamie/* 4116192895Sjamie * Return the part of pr2's name that is relative to pr1, or the whole name 4117192895Sjamie * if it does not directly follow. 4118192895Sjamie */ 4119192895Sjamie 4120192895Sjamiechar * 4121192895Sjamieprison_name(struct prison *pr1, struct prison *pr2) 4122192895Sjamie{ 4123192895Sjamie char *name; 4124192895Sjamie 4125192895Sjamie /* Jails see themselves as "0" (if they see themselves at all). */ 4126192895Sjamie if (pr1 == pr2) 4127192895Sjamie return "0"; 4128192895Sjamie name = pr2->pr_name; 4129192895Sjamie if (prison_ischild(pr1, pr2)) { 4130192895Sjamie /* 4131192895Sjamie * pr1 isn't locked (and allprison_lock may not be either) 4132192895Sjamie * so its length can't be counted on. But the number of dots 4133192895Sjamie * can be counted on - and counted. 4134192895Sjamie */ 4135192895Sjamie for (; pr1 != &prison0; pr1 = pr1->pr_parent) 4136192895Sjamie name = strchr(name, '.') + 1; 4137192895Sjamie } 4138192895Sjamie return (name); 4139192895Sjamie} 4140192895Sjamie 4141192895Sjamie/* 4142192895Sjamie * Return the part of pr2's path that is relative to pr1, or the whole path 4143192895Sjamie * if it does not directly follow. 4144192895Sjamie */ 4145192895Sjamiestatic char * 4146192895Sjamieprison_path(struct prison *pr1, struct prison *pr2) 4147192895Sjamie{ 4148192895Sjamie char *path1, *path2; 4149192895Sjamie int len1; 4150192895Sjamie 4151192895Sjamie path1 = pr1->pr_path; 4152192895Sjamie path2 = pr2->pr_path; 4153192895Sjamie if (!strcmp(path1, "/")) 4154192895Sjamie return (path2); 4155192895Sjamie len1 = strlen(path1); 4156192895Sjamie if (strncmp(path1, path2, len1)) 4157192895Sjamie return (path2); 4158192895Sjamie if (path2[len1] == '\0') 4159192895Sjamie return "/"; 4160192895Sjamie if (path2[len1] == '/') 4161192895Sjamie return (path2 + len1); 4162192895Sjamie return (path2); 4163192895Sjamie} 4164192895Sjamie 4165192895Sjamie 4166192895Sjamie/* 4167192895Sjamie * Jail-related sysctls. 4168192895Sjamie */ 4169227309Sedstatic SYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0, 4170192895Sjamie "Jails"); 4171192895Sjamie 4172113275Smikestatic int 4173113275Smikesysctl_jail_list(SYSCTL_HANDLER_ARGS) 4174113275Smike{ 4175191673Sjamie struct xprison *xp; 4176192895Sjamie struct prison *pr, *cpr; 4177191673Sjamie#ifdef INET 4178191673Sjamie struct in_addr *ip4 = NULL; 4179191673Sjamie int ip4s = 0; 4180191673Sjamie#endif 4181191673Sjamie#ifdef INET6 4182208803Scperciva struct in6_addr *ip6 = NULL; 4183191673Sjamie int ip6s = 0; 4184191673Sjamie#endif 4185192895Sjamie int descend, error; 4186113275Smike 4187191673Sjamie xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK); 4188192895Sjamie pr = req->td->td_ucred->cr_prison; 4189191673Sjamie error = 0; 4190168401Spjd sx_slock(&allprison_lock); 4191192895Sjamie FOREACH_PRISON_DESCENDANT(pr, cpr, descend) { 4192192895Sjamie#if defined(INET) || defined(INET6) 4193191673Sjamie again: 4194192895Sjamie#endif 4195192895Sjamie mtx_lock(&cpr->pr_mtx); 4196185435Sbz#ifdef INET 4197192895Sjamie if (cpr->pr_ip4s > 0) { 4198192895Sjamie if (ip4s < cpr->pr_ip4s) { 4199192895Sjamie ip4s = cpr->pr_ip4s; 4200192895Sjamie mtx_unlock(&cpr->pr_mtx); 4201191673Sjamie ip4 = realloc(ip4, ip4s * 4202191673Sjamie sizeof(struct in_addr), M_TEMP, M_WAITOK); 4203191673Sjamie goto again; 4204191673Sjamie } 4205192895Sjamie bcopy(cpr->pr_ip4, ip4, 4206192895Sjamie cpr->pr_ip4s * sizeof(struct in_addr)); 4207191673Sjamie } 4208185435Sbz#endif 4209185435Sbz#ifdef INET6 4210192895Sjamie if (cpr->pr_ip6s > 0) { 4211192895Sjamie if (ip6s < cpr->pr_ip6s) { 4212192895Sjamie ip6s = cpr->pr_ip6s; 4213192895Sjamie mtx_unlock(&cpr->pr_mtx); 4214191673Sjamie ip6 = realloc(ip6, ip6s * 4215191673Sjamie sizeof(struct in6_addr), M_TEMP, M_WAITOK); 4216191673Sjamie goto again; 4217191673Sjamie } 4218192895Sjamie bcopy(cpr->pr_ip6, ip6, 4219192895Sjamie cpr->pr_ip6s * sizeof(struct in6_addr)); 4220191673Sjamie } 4221185435Sbz#endif 4222192895Sjamie if (cpr->pr_ref == 0) { 4223192895Sjamie mtx_unlock(&cpr->pr_mtx); 4224191673Sjamie continue; 4225191673Sjamie } 4226191673Sjamie bzero(xp, sizeof(*xp)); 4227113275Smike xp->pr_version = XPRISON_VERSION; 4228192895Sjamie xp->pr_id = cpr->pr_id; 4229192895Sjamie xp->pr_state = cpr->pr_uref > 0 4230191673Sjamie ? PRISON_STATE_ALIVE : PRISON_STATE_DYING; 4231192895Sjamie strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path)); 4232194118Sjamie strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host)); 4233192895Sjamie strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name)); 4234185435Sbz#ifdef INET 4235192895Sjamie xp->pr_ip4s = cpr->pr_ip4s; 4236185435Sbz#endif 4237185435Sbz#ifdef INET6 4238192895Sjamie xp->pr_ip6s = cpr->pr_ip6s; 4239185435Sbz#endif 4240192895Sjamie mtx_unlock(&cpr->pr_mtx); 4241191673Sjamie error = SYSCTL_OUT(req, xp, sizeof(*xp)); 4242191673Sjamie if (error) 4243191673Sjamie break; 4244185435Sbz#ifdef INET 4245191673Sjamie if (xp->pr_ip4s > 0) { 4246191673Sjamie error = SYSCTL_OUT(req, ip4, 4247191673Sjamie xp->pr_ip4s * sizeof(struct in_addr)); 4248191673Sjamie if (error) 4249191673Sjamie break; 4250185435Sbz } 4251185435Sbz#endif 4252185435Sbz#ifdef INET6 4253191673Sjamie if (xp->pr_ip6s > 0) { 4254191673Sjamie error = SYSCTL_OUT(req, ip6, 4255191673Sjamie xp->pr_ip6s * sizeof(struct in6_addr)); 4256191673Sjamie if (error) 4257191673Sjamie break; 4258185435Sbz } 4259185435Sbz#endif 4260113275Smike } 4261168401Spjd sx_sunlock(&allprison_lock); 4262191673Sjamie free(xp, M_TEMP); 4263191673Sjamie#ifdef INET 4264191673Sjamie free(ip4, M_TEMP); 4265191673Sjamie#endif 4266191673Sjamie#ifdef INET6 4267191673Sjamie free(ip6, M_TEMP); 4268191673Sjamie#endif 4269167354Spjd return (error); 4270113275Smike} 4271113275Smike 4272187864SedSYSCTL_OID(_security_jail, OID_AUTO, list, 4273187864Sed CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4274187864Sed sysctl_jail_list, "S", "List of active jails"); 4275126004Spjd 4276126004Spjdstatic int 4277126004Spjdsysctl_jail_jailed(SYSCTL_HANDLER_ARGS) 4278126004Spjd{ 4279126004Spjd int error, injail; 4280126004Spjd 4281126004Spjd injail = jailed(req->td->td_ucred); 4282126004Spjd error = SYSCTL_OUT(req, &injail, sizeof(injail)); 4283126004Spjd 4284126004Spjd return (error); 4285126004Spjd} 4286192895Sjamie 4287187864SedSYSCTL_PROC(_security_jail, OID_AUTO, jailed, 4288187864Sed CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4289187864Sed sysctl_jail_jailed, "I", "Process in jail?"); 4290185435Sbz 4291250804Sjamiestatic int 4292250804Sjamiesysctl_jail_vnet(SYSCTL_HANDLER_ARGS) 4293250804Sjamie{ 4294250804Sjamie int error, havevnet; 4295250804Sjamie#ifdef VIMAGE 4296250804Sjamie struct ucred *cred = req->td->td_ucred; 4297250804Sjamie 4298250804Sjamie havevnet = jailed(cred) && prison_owns_vnet(cred); 4299250804Sjamie#else 4300250804Sjamie havevnet = 0; 4301250804Sjamie#endif 4302250804Sjamie error = SYSCTL_OUT(req, &havevnet, sizeof(havevnet)); 4303250804Sjamie 4304250804Sjamie return (error); 4305250804Sjamie} 4306250804Sjamie 4307250804SjamieSYSCTL_PROC(_security_jail, OID_AUTO, vnet, 4308250804Sjamie CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, 4309250804Sjamie sysctl_jail_vnet, "I", "Jail owns VNET?"); 4310250804Sjamie 4311192895Sjamie#if defined(INET) || defined(INET6) 4312193865SjamieSYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW, 4313192895Sjamie &jail_max_af_ips, 0, 4314301905Sjamie "Number of IP addresses a jail may have at most per address family (deprecated)"); 4315192895Sjamie#endif 4316192895Sjamie 4317192895Sjamie/* 4318302234Sbdrewery * Default parameters for jail(2) compatibility. For historical reasons, 4319192895Sjamie * the sysctl names have varying similarity to the parameter names. Prisons 4320192895Sjamie * just see their own parameters, and can't change them. 4321192895Sjamie */ 4322192895Sjamiestatic int 4323192895Sjamiesysctl_jail_default_allow(SYSCTL_HANDLER_ARGS) 4324192895Sjamie{ 4325192895Sjamie struct prison *pr; 4326192895Sjamie int allow, error, i; 4327192895Sjamie 4328192895Sjamie pr = req->td->td_ucred->cr_prison; 4329192895Sjamie allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow; 4330192895Sjamie 4331192895Sjamie /* Get the current flag value, and convert it to a boolean. */ 4332192895Sjamie i = (allow & arg2) ? 1 : 0; 4333192895Sjamie if (arg1 != NULL) 4334192895Sjamie i = !i; 4335192895Sjamie error = sysctl_handle_int(oidp, &i, 0, req); 4336192895Sjamie if (error || !req->newptr) 4337192895Sjamie return (error); 4338192895Sjamie i = i ? arg2 : 0; 4339192895Sjamie if (arg1 != NULL) 4340192895Sjamie i ^= arg2; 4341192895Sjamie /* 4342192895Sjamie * The sysctls don't have CTLFLAGS_PRISON, so assume prison0 4343192895Sjamie * for writing. 4344192895Sjamie */ 4345192895Sjamie mtx_lock(&prison0.pr_mtx); 4346192895Sjamie jail_default_allow = (jail_default_allow & ~arg2) | i; 4347192895Sjamie mtx_unlock(&prison0.pr_mtx); 4348192895Sjamie return (0); 4349192895Sjamie} 4350192895Sjamie 4351192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed, 4352192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4353192895Sjamie NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I", 4354301905Sjamie "Processes in jail can set their hostnames (deprecated)"); 4355192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only, 4356192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4357192895Sjamie (void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I", 4358301905Sjamie "Processes in jail are limited to creating UNIX/IP/route sockets only (deprecated)"); 4359192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed, 4360192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4361192895Sjamie NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I", 4362301905Sjamie "Processes in jail can use System V IPC primitives (deprecated)"); 4363192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets, 4364192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4365192895Sjamie NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I", 4366301905Sjamie "Prison root can create raw sockets (deprecated)"); 4367192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed, 4368192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4369192895Sjamie NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I", 4370301905Sjamie "Processes in jail can alter system file flags (deprecated)"); 4371192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed, 4372192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4373192895Sjamie NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I", 4374301905Sjamie "Processes in jail can mount/unmount jail-friendly file systems (deprecated)"); 4375232059SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_devfs_allowed, 4376232059Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4377232059Smm NULL, PR_ALLOW_MOUNT_DEVFS, sysctl_jail_default_allow, "I", 4378301905Sjamie "Processes in jail can mount the devfs file system (deprecated)"); 4379277985SjamieSYSCTL_PROC(_security_jail, OID_AUTO, mount_fdescfs_allowed, 4380277985Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4381277985Sjamie NULL, PR_ALLOW_MOUNT_FDESCFS, sysctl_jail_default_allow, "I", 4382301905Sjamie "Processes in jail can mount the fdescfs file system (deprecated)"); 4383232059SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_nullfs_allowed, 4384232059Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4385232059Smm NULL, PR_ALLOW_MOUNT_NULLFS, sysctl_jail_default_allow, "I", 4386301905Sjamie "Processes in jail can mount the nullfs file system (deprecated)"); 4387232278SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_procfs_allowed, 4388232278Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4389232278Smm NULL, PR_ALLOW_MOUNT_PROCFS, sysctl_jail_default_allow, "I", 4390301905Sjamie "Processes in jail can mount the procfs file system (deprecated)"); 4391295951SaraujoSYSCTL_PROC(_security_jail, OID_AUTO, mount_linprocfs_allowed, 4392295951Saraujo CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4393295951Saraujo NULL, PR_ALLOW_MOUNT_LINPROCFS, sysctl_jail_default_allow, "I", 4394301905Sjamie "Processes in jail can mount the linprocfs file system (deprecated)"); 4395295951SaraujoSYSCTL_PROC(_security_jail, OID_AUTO, mount_linsysfs_allowed, 4396295951Saraujo CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4397295951Saraujo NULL, PR_ALLOW_MOUNT_LINSYSFS, sysctl_jail_default_allow, "I", 4398301905Sjamie "Processes in jail can mount the linsysfs file system (deprecated)"); 4399254741SdelphijSYSCTL_PROC(_security_jail, OID_AUTO, mount_tmpfs_allowed, 4400254741Sdelphij CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4401254741Sdelphij NULL, PR_ALLOW_MOUNT_TMPFS, sysctl_jail_default_allow, "I", 4402301905Sjamie "Processes in jail can mount the tmpfs file system (deprecated)"); 4403232186SmmSYSCTL_PROC(_security_jail, OID_AUTO, mount_zfs_allowed, 4404232186Smm CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4405232186Smm NULL, PR_ALLOW_MOUNT_ZFS, sysctl_jail_default_allow, "I", 4406301905Sjamie "Processes in jail can mount the zfs file system (deprecated)"); 4407192895Sjamie 4408192895Sjamiestatic int 4409192895Sjamiesysctl_jail_default_level(SYSCTL_HANDLER_ARGS) 4410192895Sjamie{ 4411192895Sjamie struct prison *pr; 4412192895Sjamie int level, error; 4413192895Sjamie 4414192895Sjamie pr = req->td->td_ucred->cr_prison; 4415192895Sjamie level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2); 4416192895Sjamie error = sysctl_handle_int(oidp, &level, 0, req); 4417192895Sjamie if (error || !req->newptr) 4418192895Sjamie return (error); 4419192895Sjamie *(int *)arg1 = level; 4420192895Sjamie return (0); 4421192895Sjamie} 4422192895Sjamie 4423192895SjamieSYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs, 4424192895Sjamie CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, 4425192895Sjamie &jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs), 4426192895Sjamie sysctl_jail_default_level, "I", 4427301905Sjamie "Processes in jail cannot see all mounted file systems (deprecated)"); 4428192895Sjamie 4429231267SmmSYSCTL_PROC(_security_jail, OID_AUTO, devfs_ruleset, 4430231267Smm CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, 4431231267Smm &jail_default_devfs_rsnum, offsetof(struct prison, pr_devfs_rsnum), 4432231267Smm sysctl_jail_default_level, "I", 4433301905Sjamie "Ruleset for the devfs filesystem in jail (deprecated)"); 4434231267Smm 4435192895Sjamie/* 4436192895Sjamie * Nodes to describe jail parameters. Maximum length of string parameters 4437192895Sjamie * is returned in the string itself, and the other parameters exist merely 4438192895Sjamie * to make themselves and their types known. 4439192895Sjamie */ 4440192895SjamieSYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0, 4441192895Sjamie "Jail parameters"); 4442192895Sjamie 4443192895Sjamieint 4444192895Sjamiesysctl_jail_param(SYSCTL_HANDLER_ARGS) 4445192895Sjamie{ 4446192895Sjamie int i; 4447192895Sjamie long l; 4448192895Sjamie size_t s; 4449192895Sjamie char numbuf[12]; 4450192895Sjamie 4451192895Sjamie switch (oidp->oid_kind & CTLTYPE) 4452192895Sjamie { 4453192895Sjamie case CTLTYPE_LONG: 4454192895Sjamie case CTLTYPE_ULONG: 4455192895Sjamie l = 0; 4456192895Sjamie#ifdef SCTL_MASK32 4457192895Sjamie if (!(req->flags & SCTL_MASK32)) 4458192895Sjamie#endif 4459192895Sjamie return (SYSCTL_OUT(req, &l, sizeof(l))); 4460192895Sjamie case CTLTYPE_INT: 4461192895Sjamie case CTLTYPE_UINT: 4462192895Sjamie i = 0; 4463192895Sjamie return (SYSCTL_OUT(req, &i, sizeof(i))); 4464192895Sjamie case CTLTYPE_STRING: 4465219819Sjeff snprintf(numbuf, sizeof(numbuf), "%jd", (intmax_t)arg2); 4466192895Sjamie return 4467192895Sjamie (sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req)); 4468192895Sjamie case CTLTYPE_STRUCT: 4469192895Sjamie s = (size_t)arg2; 4470192895Sjamie return (SYSCTL_OUT(req, &s, sizeof(s))); 4471192895Sjamie } 4472192895Sjamie return (0); 4473192895Sjamie} 4474192895Sjamie 4475280632Sian/* 4476280632Sian * CTLFLAG_RDTUN in the following indicates jail parameters that can be set at 4477280632Sian * jail creation time but cannot be changed in an existing jail. 4478280632Sian */ 4479192895SjamieSYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID"); 4480192895SjamieSYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID"); 4481192895SjamieSYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name"); 4482192895SjamieSYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path"); 4483192895SjamieSYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW, 4484192895Sjamie "I", "Jail secure level"); 4485280632SianSYSCTL_JAIL_PARAM(, osreldate, CTLTYPE_INT | CTLFLAG_RDTUN, "I", 4486280632Sian "Jail value for kern.osreldate and uname -K"); 4487280632SianSYSCTL_JAIL_PARAM_STRING(, osrelease, CTLFLAG_RDTUN, OSRELEASELEN, 4488280632Sian "Jail value for kern.osrelease and uname -r"); 4489192895SjamieSYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW, 4490192895Sjamie "I", "Jail cannot see all mounted file systems"); 4491231267SmmSYSCTL_JAIL_PARAM(, devfs_ruleset, CTLTYPE_INT | CTLFLAG_RW, 4492231267Smm "I", "Ruleset for in-jail devfs mounts"); 4493192895SjamieSYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW, 4494192895Sjamie "B", "Jail persistence"); 4495194251Sjamie#ifdef VIMAGE 4496194251SjamieSYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN, 4497195870Sjamie "E,jailsys", "Virtual network stack"); 4498194251Sjamie#endif 4499192895SjamieSYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD, 4500192895Sjamie "B", "Jail is in the process of shutting down"); 4501192895Sjamie 4502194762SjamieSYSCTL_JAIL_PARAM_NODE(children, "Number of child jails"); 4503194762SjamieSYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD, 4504194762Sjamie "I", "Current number of child jails"); 4505194762SjamieSYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW, 4506194762Sjamie "I", "Maximum number of child jails"); 4507194762Sjamie 4508195870SjamieSYSCTL_JAIL_PARAM_SYS_NODE(host, CTLFLAG_RW, "Jail host info"); 4509192895SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN, 4510192895Sjamie "Jail hostname"); 4511193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN, 4512193066Sjamie "Jail NIS domainname"); 4513193066SjamieSYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN, 4514193066Sjamie "Jail host UUID"); 4515193066SjamieSYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW, 4516193066Sjamie "LU", "Jail host ID"); 4517192895Sjamie 4518192895SjamieSYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset"); 4519192895SjamieSYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID"); 4520192895Sjamie 4521192895Sjamie#ifdef INET 4522195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip4, CTLFLAG_RDTUN, 4523195974Sjamie "Jail IPv4 address virtualization"); 4524192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr), 4525192895Sjamie "S,in_addr,a", "Jail IPv4 addresses"); 4526202468SbzSYSCTL_JAIL_PARAM(_ip4, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4527202468Sbz "B", "Do (not) use IPv4 source address selection rather than the " 4528202468Sbz "primary jail IPv4 address."); 4529192895Sjamie#endif 4530192895Sjamie#ifdef INET6 4531195974SjamieSYSCTL_JAIL_PARAM_SYS_NODE(ip6, CTLFLAG_RDTUN, 4532195974Sjamie "Jail IPv6 address virtualization"); 4533192895SjamieSYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr), 4534192895Sjamie "S,in6_addr,a", "Jail IPv6 addresses"); 4535202468SbzSYSCTL_JAIL_PARAM(_ip6, saddrsel, CTLTYPE_INT | CTLFLAG_RW, 4536202468Sbz "B", "Do (not) use IPv6 source address selection rather than the " 4537202468Sbz "primary jail IPv6 address."); 4538192895Sjamie#endif 4539192895Sjamie 4540192895SjamieSYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags"); 4541192895SjamieSYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW, 4542192895Sjamie "B", "Jail may set hostname"); 4543192895SjamieSYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW, 4544192895Sjamie "B", "Jail may use SYSV IPC"); 4545192895SjamieSYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW, 4546192895Sjamie "B", "Jail may create raw sockets"); 4547192895SjamieSYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW, 4548192895Sjamie "B", "Jail may alter system file flags"); 4549192895SjamieSYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW, 4550192895Sjamie "B", "Jail may set file quotas"); 4551192895SjamieSYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW, 4552192895Sjamie "B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route"); 4553192895Sjamie 4554232059SmmSYSCTL_JAIL_PARAM_SUBNODE(allow, mount, "Jail mount/unmount permission flags"); 4555232059SmmSYSCTL_JAIL_PARAM(_allow_mount, , CTLTYPE_INT | CTLFLAG_RW, 4556232059Smm "B", "Jail may mount/unmount jail-friendly file systems in general"); 4557232059SmmSYSCTL_JAIL_PARAM(_allow_mount, devfs, CTLTYPE_INT | CTLFLAG_RW, 4558232186Smm "B", "Jail may mount the devfs file system"); 4559277985SjamieSYSCTL_JAIL_PARAM(_allow_mount, fdescfs, CTLTYPE_INT | CTLFLAG_RW, 4560277985Sjamie "B", "Jail may mount the fdescfs file system"); 4561232059SmmSYSCTL_JAIL_PARAM(_allow_mount, nullfs, CTLTYPE_INT | CTLFLAG_RW, 4562232186Smm "B", "Jail may mount the nullfs file system"); 4563232278SmmSYSCTL_JAIL_PARAM(_allow_mount, procfs, CTLTYPE_INT | CTLFLAG_RW, 4564232278Smm "B", "Jail may mount the procfs file system"); 4565295951SaraujoSYSCTL_JAIL_PARAM(_allow_mount, linprocfs, CTLTYPE_INT | CTLFLAG_RW, 4566295951Saraujo "B", "Jail may mount the linprocfs file system"); 4567295951SaraujoSYSCTL_JAIL_PARAM(_allow_mount, linsysfs, CTLTYPE_INT | CTLFLAG_RW, 4568295951Saraujo "B", "Jail may mount the linsysfs file system"); 4569254741SdelphijSYSCTL_JAIL_PARAM(_allow_mount, tmpfs, CTLTYPE_INT | CTLFLAG_RW, 4570254741Sdelphij "B", "Jail may mount the tmpfs file system"); 4571232186SmmSYSCTL_JAIL_PARAM(_allow_mount, zfs, CTLTYPE_INT | CTLFLAG_RW, 4572232186Smm "B", "Jail may mount the zfs file system"); 4573232059Smm 4574284665Strasz#ifdef RACCT 4575220137Straszvoid 4576220137Straszprison_racct_foreach(void (*callback)(struct racct *racct, 4577220137Strasz void *arg2, void *arg3), void *arg2, void *arg3) 4578220137Strasz{ 4579221362Strasz struct prison_racct *prr; 4580192895Sjamie 4581284665Strasz ASSERT_RACCT_ENABLED(); 4582284665Strasz 4583220137Strasz sx_slock(&allprison_lock); 4584221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) 4585221362Strasz (callback)(prr->prr_racct, arg2, arg3); 4586220137Strasz sx_sunlock(&allprison_lock); 4587220137Strasz} 4588220137Strasz 4589221362Straszstatic struct prison_racct * 4590221362Straszprison_racct_find_locked(const char *name) 4591221362Strasz{ 4592221362Strasz struct prison_racct *prr; 4593221362Strasz 4594284665Strasz ASSERT_RACCT_ENABLED(); 4595221362Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4596221362Strasz 4597221362Strasz if (name[0] == '\0' || strlen(name) >= MAXHOSTNAMELEN) 4598221362Strasz return (NULL); 4599221362Strasz 4600221362Strasz LIST_FOREACH(prr, &allprison_racct, prr_next) { 4601221362Strasz if (strcmp(name, prr->prr_name) != 0) 4602221362Strasz continue; 4603221362Strasz 4604221362Strasz /* Found prison_racct with a matching name? */ 4605221362Strasz prison_racct_hold(prr); 4606221362Strasz return (prr); 4607221362Strasz } 4608221362Strasz 4609221362Strasz /* Add new prison_racct. */ 4610221362Strasz prr = malloc(sizeof(*prr), M_PRISON_RACCT, M_ZERO | M_WAITOK); 4611221362Strasz racct_create(&prr->prr_racct); 4612221362Strasz 4613221362Strasz strcpy(prr->prr_name, name); 4614221362Strasz refcount_init(&prr->prr_refcount, 1); 4615221362Strasz LIST_INSERT_HEAD(&allprison_racct, prr, prr_next); 4616221362Strasz 4617221362Strasz return (prr); 4618221362Strasz} 4619221362Strasz 4620221362Straszstruct prison_racct * 4621221362Straszprison_racct_find(const char *name) 4622221362Strasz{ 4623221362Strasz struct prison_racct *prr; 4624221362Strasz 4625284665Strasz ASSERT_RACCT_ENABLED(); 4626284665Strasz 4627221362Strasz sx_xlock(&allprison_lock); 4628221362Strasz prr = prison_racct_find_locked(name); 4629221362Strasz sx_xunlock(&allprison_lock); 4630221362Strasz return (prr); 4631221362Strasz} 4632221362Strasz 4633221362Straszvoid 4634221362Straszprison_racct_hold(struct prison_racct *prr) 4635221362Strasz{ 4636221362Strasz 4637284665Strasz ASSERT_RACCT_ENABLED(); 4638284665Strasz 4639221362Strasz refcount_acquire(&prr->prr_refcount); 4640221362Strasz} 4641221362Strasz 4642232598Straszstatic void 4643232598Straszprison_racct_free_locked(struct prison_racct *prr) 4644232598Strasz{ 4645232598Strasz 4646284665Strasz ASSERT_RACCT_ENABLED(); 4647232598Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4648232598Strasz 4649232598Strasz if (refcount_release(&prr->prr_refcount)) { 4650232598Strasz racct_destroy(&prr->prr_racct); 4651232598Strasz LIST_REMOVE(prr, prr_next); 4652232598Strasz free(prr, M_PRISON_RACCT); 4653232598Strasz } 4654232598Strasz} 4655232598Strasz 4656221362Straszvoid 4657221362Straszprison_racct_free(struct prison_racct *prr) 4658221362Strasz{ 4659221362Strasz int old; 4660221362Strasz 4661284665Strasz ASSERT_RACCT_ENABLED(); 4662232598Strasz sx_assert(&allprison_lock, SA_UNLOCKED); 4663232598Strasz 4664221362Strasz old = prr->prr_refcount; 4665221362Strasz if (old > 1 && atomic_cmpset_int(&prr->prr_refcount, old, old - 1)) 4666221362Strasz return; 4667221362Strasz 4668221362Strasz sx_xlock(&allprison_lock); 4669232598Strasz prison_racct_free_locked(prr); 4670221362Strasz sx_xunlock(&allprison_lock); 4671221362Strasz} 4672221362Strasz 4673221362Straszstatic void 4674221362Straszprison_racct_attach(struct prison *pr) 4675221362Strasz{ 4676221362Strasz struct prison_racct *prr; 4677221362Strasz 4678284665Strasz ASSERT_RACCT_ENABLED(); 4679232598Strasz sx_assert(&allprison_lock, SA_XLOCKED); 4680232598Strasz 4681221362Strasz prr = prison_racct_find_locked(pr->pr_name); 4682221362Strasz KASSERT(prr != NULL, ("cannot find prison_racct")); 4683221362Strasz 4684221362Strasz pr->pr_prison_racct = prr; 4685221362Strasz} 4686221362Strasz 4687232598Strasz/* 4688232598Strasz * Handle jail renaming. From the racct point of view, renaming means 4689232598Strasz * moving from one prison_racct to another. 4690232598Strasz */ 4691221362Straszstatic void 4692232598Straszprison_racct_modify(struct prison *pr) 4693232598Strasz{ 4694232598Strasz struct proc *p; 4695232598Strasz struct ucred *cred; 4696232598Strasz struct prison_racct *oldprr; 4697232598Strasz 4698284665Strasz ASSERT_RACCT_ENABLED(); 4699284665Strasz 4700232598Strasz sx_slock(&allproc_lock); 4701232598Strasz sx_xlock(&allprison_lock); 4702232598Strasz 4703235795Strasz if (strcmp(pr->pr_name, pr->pr_prison_racct->prr_name) == 0) { 4704235795Strasz sx_xunlock(&allprison_lock); 4705235795Strasz sx_sunlock(&allproc_lock); 4706232598Strasz return; 4707235795Strasz } 4708232598Strasz 4709232598Strasz oldprr = pr->pr_prison_racct; 4710232598Strasz pr->pr_prison_racct = NULL; 4711232598Strasz 4712232598Strasz prison_racct_attach(pr); 4713232598Strasz 4714232598Strasz /* 4715232598Strasz * Move resource utilisation records. 4716232598Strasz */ 4717232598Strasz racct_move(pr->pr_prison_racct->prr_racct, oldprr->prr_racct); 4718232598Strasz 4719232598Strasz /* 4720232598Strasz * Force rctl to reattach rules to processes. 4721232598Strasz */ 4722232598Strasz FOREACH_PROC_IN_SYSTEM(p) { 4723232598Strasz PROC_LOCK(p); 4724232598Strasz cred = crhold(p->p_ucred); 4725232598Strasz PROC_UNLOCK(p); 4726232598Strasz racct_proc_ucred_changed(p, cred, cred); 4727232598Strasz crfree(cred); 4728232598Strasz } 4729232598Strasz 4730232598Strasz sx_sunlock(&allproc_lock); 4731232598Strasz prison_racct_free_locked(oldprr); 4732232598Strasz sx_xunlock(&allprison_lock); 4733232598Strasz} 4734232598Strasz 4735232598Straszstatic void 4736221362Straszprison_racct_detach(struct prison *pr) 4737221362Strasz{ 4738232598Strasz 4739284665Strasz ASSERT_RACCT_ENABLED(); 4740232598Strasz sx_assert(&allprison_lock, SA_UNLOCKED); 4741232598Strasz 4742244404Smjg if (pr->pr_prison_racct == NULL) 4743244404Smjg return; 4744221362Strasz prison_racct_free(pr->pr_prison_racct); 4745221362Strasz pr->pr_prison_racct = NULL; 4746221362Strasz} 4747221362Strasz#endif /* RACCT */ 4748221362Strasz 4749185435Sbz#ifdef DDB 4750191673Sjamie 4751191673Sjamiestatic void 4752191673Sjamiedb_show_prison(struct prison *pr) 4753185435Sbz{ 4754192895Sjamie int fi; 4755191673Sjamie#if defined(INET) || defined(INET6) 4756191673Sjamie int ii; 4757185435Sbz#endif 4758195870Sjamie unsigned jsf; 4759185435Sbz#ifdef INET6 4760185435Sbz char ip6buf[INET6_ADDRSTRLEN]; 4761185435Sbz#endif 4762185435Sbz 4763191673Sjamie db_printf("prison %p:\n", pr); 4764191673Sjamie db_printf(" jid = %d\n", pr->pr_id); 4765191673Sjamie db_printf(" name = %s\n", pr->pr_name); 4766192895Sjamie db_printf(" parent = %p\n", pr->pr_parent); 4767191673Sjamie db_printf(" ref = %d\n", pr->pr_ref); 4768191673Sjamie db_printf(" uref = %d\n", pr->pr_uref); 4769191673Sjamie db_printf(" path = %s\n", pr->pr_path); 4770191673Sjamie db_printf(" cpuset = %d\n", pr->pr_cpuset 4771191673Sjamie ? pr->pr_cpuset->cs_id : -1); 4772194251Sjamie#ifdef VIMAGE 4773194251Sjamie db_printf(" vnet = %p\n", pr->pr_vnet); 4774194251Sjamie#endif 4775191673Sjamie db_printf(" root = %p\n", pr->pr_root); 4776191673Sjamie db_printf(" securelevel = %d\n", pr->pr_securelevel); 4777231267Smm db_printf(" devfs_rsnum = %d\n", pr->pr_devfs_rsnum); 4778202123Sbz db_printf(" children.max = %d\n", pr->pr_childmax); 4779202123Sbz db_printf(" children.cur = %d\n", pr->pr_childcount); 4780192895Sjamie db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children)); 4781192895Sjamie db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling)); 4782202123Sbz db_printf(" flags = 0x%x", pr->pr_flags); 4783192895Sjamie for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]); 4784192895Sjamie fi++) 4785192895Sjamie if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi))) 4786192895Sjamie db_printf(" %s", pr_flag_names[fi]); 4787195870Sjamie for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]); 4788195870Sjamie fi++) { 4789195870Sjamie jsf = pr->pr_flags & 4790195870Sjamie (pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new); 4791195870Sjamie db_printf(" %-16s= %s\n", pr_flag_jailsys[fi].name, 4792195870Sjamie pr_flag_jailsys[fi].disable && 4793195870Sjamie (jsf == pr_flag_jailsys[fi].disable) ? "disable" 4794195870Sjamie : (jsf == pr_flag_jailsys[fi].new) ? "new" 4795195870Sjamie : "inherit"); 4796195870Sjamie } 4797202123Sbz db_printf(" allow = 0x%x", pr->pr_allow); 4798192895Sjamie for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]); 4799192895Sjamie fi++) 4800192895Sjamie if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi))) 4801192895Sjamie db_printf(" %s", pr_allow_names[fi]); 4802191673Sjamie db_printf("\n"); 4803192895Sjamie db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs); 4804194118Sjamie db_printf(" host.hostname = %s\n", pr->pr_hostname); 4805194118Sjamie db_printf(" host.domainname = %s\n", pr->pr_domainname); 4806194118Sjamie db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid); 4807193066Sjamie db_printf(" host.hostid = %lu\n", pr->pr_hostid); 4808185435Sbz#ifdef INET 4809191673Sjamie db_printf(" ip4s = %d\n", pr->pr_ip4s); 4810191673Sjamie for (ii = 0; ii < pr->pr_ip4s; ii++) 4811191673Sjamie db_printf(" %s %s\n", 4812202123Sbz ii == 0 ? "ip4.addr =" : " ", 4813191673Sjamie inet_ntoa(pr->pr_ip4[ii])); 4814185435Sbz#endif 4815185435Sbz#ifdef INET6 4816191673Sjamie db_printf(" ip6s = %d\n", pr->pr_ip6s); 4817191673Sjamie for (ii = 0; ii < pr->pr_ip6s; ii++) 4818191673Sjamie db_printf(" %s %s\n", 4819202123Sbz ii == 0 ? "ip6.addr =" : " ", 4820191673Sjamie ip6_sprintf(ip6buf, &pr->pr_ip6[ii])); 4821191673Sjamie#endif 4822191673Sjamie} 4823191673Sjamie 4824191673SjamieDB_SHOW_COMMAND(prison, db_show_prison_command) 4825191673Sjamie{ 4826191673Sjamie struct prison *pr; 4827191673Sjamie 4828191673Sjamie if (!have_addr) { 4829192895Sjamie /* 4830192895Sjamie * Show all prisons in the list, and prison0 which is not 4831192895Sjamie * listed. 4832192895Sjamie */ 4833192895Sjamie db_show_prison(&prison0); 4834192895Sjamie if (!db_pager_quit) { 4835192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) { 4836192895Sjamie db_show_prison(pr); 4837192895Sjamie if (db_pager_quit) 4838192895Sjamie break; 4839192895Sjamie } 4840191673Sjamie } 4841191673Sjamie return; 4842191673Sjamie } 4843191673Sjamie 4844192895Sjamie if (addr == 0) 4845192895Sjamie pr = &prison0; 4846192895Sjamie else { 4847192895Sjamie /* Look for a prison with the ID and with references. */ 4848191673Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4849192895Sjamie if (pr->pr_id == addr && pr->pr_ref > 0) 4850191673Sjamie break; 4851192895Sjamie if (pr == NULL) 4852192895Sjamie /* Look again, without requiring a reference. */ 4853192895Sjamie TAILQ_FOREACH(pr, &allprison, pr_list) 4854192895Sjamie if (pr->pr_id == addr) 4855192895Sjamie break; 4856192895Sjamie if (pr == NULL) 4857192895Sjamie /* Assume address points to a valid prison. */ 4858192895Sjamie pr = (struct prison *)addr; 4859192895Sjamie } 4860191673Sjamie db_show_prison(pr); 4861185435Sbz} 4862191673Sjamie 4863185435Sbz#endif /* DDB */ 4864