1626913ed1
A new jail(8) option "devfs_ruleset" defines the ruleset enforcement for mounting devfs inside jails. A value of -1 disables mounting devfs in jails, a value of zero means no restrictions. Nested jails can only have mounting devfs disabled or inherit parent's enforcement as jails are not allowed to view or manipulate devfs(8) rules. Utilizes new functions introduced in r231265. Reviewed by: jamie MFC after: 1 month
4555 lines
110 KiB
C
4555 lines
110 KiB
C
/*-
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* Copyright (c) 1999 Poul-Henning Kamp.
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* Copyright (c) 2008 Bjoern A. Zeeb.
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* Copyright (c) 2009 James Gritton.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include "opt_ddb.h"
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/errno.h>
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#include <sys/sysproto.h>
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#include <sys/malloc.h>
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#include <sys/osd.h>
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#include <sys/priv.h>
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#include <sys/proc.h>
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#include <sys/taskqueue.h>
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#include <sys/fcntl.h>
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#include <sys/jail.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/racct.h>
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#include <sys/refcount.h>
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#include <sys/sx.h>
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#include <sys/sysent.h>
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#include <sys/namei.h>
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#include <sys/mount.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysctl.h>
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#include <sys/vnode.h>
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#include <net/if.h>
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#include <net/vnet.h>
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#include <netinet/in.h>
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#ifdef DDB
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#include <ddb/ddb.h>
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#ifdef INET6
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#include <netinet6/in6_var.h>
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#endif /* INET6 */
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#endif /* DDB */
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#include <security/mac/mac_framework.h>
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#define DEFAULT_HOSTUUID "00000000-0000-0000-0000-000000000000"
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MALLOC_DEFINE(M_PRISON, "prison", "Prison structures");
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static MALLOC_DEFINE(M_PRISON_RACCT, "prison_racct", "Prison racct structures");
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/* Keep struct prison prison0 and some code in kern_jail_set() readable. */
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#ifdef INET
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#ifdef INET6
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#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL|PR_IP6_SADDRSEL
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#else
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#define _PR_IP_SADDRSEL PR_IP4_SADDRSEL
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#endif
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#else /* !INET */
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#ifdef INET6
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#define _PR_IP_SADDRSEL PR_IP6_SADDRSEL
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#else
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#define _PR_IP_SADDRSEL 0
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#endif
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#endif
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/* prison0 describes what is "real" about the system. */
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struct prison prison0 = {
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.pr_id = 0,
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.pr_name = "0",
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.pr_ref = 1,
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.pr_uref = 1,
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.pr_path = "/",
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.pr_securelevel = -1,
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.pr_devfs_rsnum = 0,
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.pr_childmax = JAIL_MAX,
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.pr_hostuuid = DEFAULT_HOSTUUID,
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.pr_children = LIST_HEAD_INITIALIZER(prison0.pr_children),
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#ifdef VIMAGE
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.pr_flags = PR_HOST|PR_VNET|_PR_IP_SADDRSEL,
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#else
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.pr_flags = PR_HOST|_PR_IP_SADDRSEL,
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#endif
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.pr_allow = PR_ALLOW_ALL,
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};
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MTX_SYSINIT(prison0, &prison0.pr_mtx, "jail mutex", MTX_DEF);
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/* allprison, allprison_racct and lastprid are protected by allprison_lock. */
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struct sx allprison_lock;
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SX_SYSINIT(allprison_lock, &allprison_lock, "allprison");
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struct prisonlist allprison = TAILQ_HEAD_INITIALIZER(allprison);
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LIST_HEAD(, prison_racct) allprison_racct;
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int lastprid = 0;
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static int do_jail_attach(struct thread *td, struct prison *pr);
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static void prison_complete(void *context, int pending);
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static void prison_deref(struct prison *pr, int flags);
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static char *prison_path(struct prison *pr1, struct prison *pr2);
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static void prison_remove_one(struct prison *pr);
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#ifdef RACCT
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static void prison_racct_attach(struct prison *pr);
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static void prison_racct_detach(struct prison *pr);
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#endif
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#ifdef INET
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static int _prison_check_ip4(struct prison *pr, struct in_addr *ia);
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static int prison_restrict_ip4(struct prison *pr, struct in_addr *newip4);
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#endif
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#ifdef INET6
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static int _prison_check_ip6(struct prison *pr, struct in6_addr *ia6);
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static int prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6);
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#endif
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/* Flags for prison_deref */
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#define PD_DEREF 0x01
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#define PD_DEUREF 0x02
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#define PD_LOCKED 0x04
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#define PD_LIST_SLOCKED 0x08
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#define PD_LIST_XLOCKED 0x10
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/*
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* Parameter names corresponding to PR_* flag values. Size values are for kvm
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* as we cannot figure out the size of a sparse array, or an array without a
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* terminating entry.
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*/
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static char *pr_flag_names[] = {
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[0] = "persist",
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#ifdef INET
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[7] = "ip4.saddrsel",
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#endif
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#ifdef INET6
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[8] = "ip6.saddrsel",
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#endif
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};
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const size_t pr_flag_names_size = sizeof(pr_flag_names);
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static char *pr_flag_nonames[] = {
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[0] = "nopersist",
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#ifdef INET
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[7] = "ip4.nosaddrsel",
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#endif
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#ifdef INET6
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[8] = "ip6.nosaddrsel",
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#endif
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};
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const size_t pr_flag_nonames_size = sizeof(pr_flag_nonames);
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struct jailsys_flags {
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const char *name;
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unsigned disable;
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unsigned new;
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} pr_flag_jailsys[] = {
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{ "host", 0, PR_HOST },
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#ifdef VIMAGE
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{ "vnet", 0, PR_VNET },
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#endif
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#ifdef INET
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{ "ip4", PR_IP4_USER | PR_IP4_DISABLE, PR_IP4_USER },
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#endif
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#ifdef INET6
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{ "ip6", PR_IP6_USER | PR_IP6_DISABLE, PR_IP6_USER },
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#endif
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};
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const size_t pr_flag_jailsys_size = sizeof(pr_flag_jailsys);
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static char *pr_allow_names[] = {
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"allow.set_hostname",
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"allow.sysvipc",
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"allow.raw_sockets",
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"allow.chflags",
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"allow.mount",
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"allow.quotas",
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"allow.socket_af",
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};
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const size_t pr_allow_names_size = sizeof(pr_allow_names);
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static char *pr_allow_nonames[] = {
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"allow.noset_hostname",
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"allow.nosysvipc",
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"allow.noraw_sockets",
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"allow.nochflags",
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"allow.nomount",
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"allow.noquotas",
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"allow.nosocket_af",
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};
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const size_t pr_allow_nonames_size = sizeof(pr_allow_nonames);
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#define JAIL_DEFAULT_ALLOW PR_ALLOW_SET_HOSTNAME
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#define JAIL_DEFAULT_ENFORCE_STATFS 2
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#define JAIL_DEFAULT_DEVFS_RSNUM -1
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static unsigned jail_default_allow = JAIL_DEFAULT_ALLOW;
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static int jail_default_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS;
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static int jail_default_devfs_rsnum = JAIL_DEFAULT_DEVFS_RSNUM;
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#if defined(INET) || defined(INET6)
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static unsigned jail_max_af_ips = 255;
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#endif
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#ifdef INET
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static int
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qcmp_v4(const void *ip1, const void *ip2)
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{
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in_addr_t iaa, iab;
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/*
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* We need to compare in HBO here to get the list sorted as expected
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* by the result of the code. Sorting NBO addresses gives you
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* interesting results. If you do not understand, do not try.
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*/
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iaa = ntohl(((const struct in_addr *)ip1)->s_addr);
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iab = ntohl(((const struct in_addr *)ip2)->s_addr);
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/*
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* Do not simply return the difference of the two numbers, the int is
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* not wide enough.
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*/
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if (iaa > iab)
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return (1);
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else if (iaa < iab)
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return (-1);
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else
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return (0);
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}
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#endif
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#ifdef INET6
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static int
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qcmp_v6(const void *ip1, const void *ip2)
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{
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const struct in6_addr *ia6a, *ia6b;
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int i, rc;
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ia6a = (const struct in6_addr *)ip1;
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ia6b = (const struct in6_addr *)ip2;
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rc = 0;
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for (i = 0; rc == 0 && i < sizeof(struct in6_addr); i++) {
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if (ia6a->s6_addr[i] > ia6b->s6_addr[i])
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rc = 1;
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else if (ia6a->s6_addr[i] < ia6b->s6_addr[i])
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rc = -1;
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}
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return (rc);
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}
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#endif
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/*
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* struct jail_args {
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* struct jail *jail;
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* };
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*/
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int
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sys_jail(struct thread *td, struct jail_args *uap)
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{
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uint32_t version;
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int error;
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struct jail j;
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error = copyin(uap->jail, &version, sizeof(uint32_t));
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if (error)
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return (error);
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switch (version) {
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case 0:
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{
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struct jail_v0 j0;
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/* FreeBSD single IPv4 jails. */
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bzero(&j, sizeof(struct jail));
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error = copyin(uap->jail, &j0, sizeof(struct jail_v0));
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if (error)
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return (error);
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j.version = j0.version;
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j.path = j0.path;
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j.hostname = j0.hostname;
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j.ip4s = j0.ip_number;
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break;
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}
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case 1:
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/*
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* Version 1 was used by multi-IPv4 jail implementations
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* that never made it into the official kernel.
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*/
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return (EINVAL);
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case 2: /* JAIL_API_VERSION */
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/* FreeBSD multi-IPv4/IPv6,noIP jails. */
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error = copyin(uap->jail, &j, sizeof(struct jail));
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if (error)
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return (error);
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break;
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default:
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/* Sci-Fi jails are not supported, sorry. */
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return (EINVAL);
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}
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return (kern_jail(td, &j));
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}
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int
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kern_jail(struct thread *td, struct jail *j)
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{
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struct iovec optiov[2 * (4
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+ sizeof(pr_allow_names) / sizeof(pr_allow_names[0])
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#ifdef INET
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+ 1
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#endif
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#ifdef INET6
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+ 1
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#endif
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)];
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struct uio opt;
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char *u_path, *u_hostname, *u_name;
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#ifdef INET
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uint32_t ip4s;
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struct in_addr *u_ip4;
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#endif
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#ifdef INET6
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struct in6_addr *u_ip6;
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#endif
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size_t tmplen;
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int error, enforce_statfs, fi;
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bzero(&optiov, sizeof(optiov));
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opt.uio_iov = optiov;
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opt.uio_iovcnt = 0;
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opt.uio_offset = -1;
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opt.uio_resid = -1;
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opt.uio_segflg = UIO_SYSSPACE;
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opt.uio_rw = UIO_READ;
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opt.uio_td = td;
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/* Set permissions for top-level jails from sysctls. */
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if (!jailed(td->td_ucred)) {
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for (fi = 0; fi < sizeof(pr_allow_names) /
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sizeof(pr_allow_names[0]); fi++) {
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optiov[opt.uio_iovcnt].iov_base =
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(jail_default_allow & (1 << fi))
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? pr_allow_names[fi] : pr_allow_nonames[fi];
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optiov[opt.uio_iovcnt].iov_len =
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strlen(optiov[opt.uio_iovcnt].iov_base) + 1;
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opt.uio_iovcnt += 2;
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}
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optiov[opt.uio_iovcnt].iov_base = "enforce_statfs";
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optiov[opt.uio_iovcnt].iov_len = sizeof("enforce_statfs");
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opt.uio_iovcnt++;
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enforce_statfs = jail_default_enforce_statfs;
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optiov[opt.uio_iovcnt].iov_base = &enforce_statfs;
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optiov[opt.uio_iovcnt].iov_len = sizeof(enforce_statfs);
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opt.uio_iovcnt++;
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}
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tmplen = MAXPATHLEN + MAXHOSTNAMELEN + MAXHOSTNAMELEN;
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#ifdef INET
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ip4s = (j->version == 0) ? 1 : j->ip4s;
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if (ip4s > jail_max_af_ips)
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return (EINVAL);
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tmplen += ip4s * sizeof(struct in_addr);
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#else
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if (j->ip4s > 0)
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return (EINVAL);
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#endif
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#ifdef INET6
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if (j->ip6s > jail_max_af_ips)
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return (EINVAL);
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tmplen += j->ip6s * sizeof(struct in6_addr);
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#else
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if (j->ip6s > 0)
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return (EINVAL);
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#endif
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u_path = malloc(tmplen, M_TEMP, M_WAITOK);
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u_hostname = u_path + MAXPATHLEN;
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u_name = u_hostname + MAXHOSTNAMELEN;
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#ifdef INET
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u_ip4 = (struct in_addr *)(u_name + MAXHOSTNAMELEN);
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#endif
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#ifdef INET6
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#ifdef INET
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u_ip6 = (struct in6_addr *)(u_ip4 + ip4s);
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#else
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u_ip6 = (struct in6_addr *)(u_name + MAXHOSTNAMELEN);
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#endif
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#endif
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optiov[opt.uio_iovcnt].iov_base = "path";
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optiov[opt.uio_iovcnt].iov_len = sizeof("path");
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opt.uio_iovcnt++;
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optiov[opt.uio_iovcnt].iov_base = u_path;
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error = copyinstr(j->path, u_path, MAXPATHLEN,
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&optiov[opt.uio_iovcnt].iov_len);
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if (error) {
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free(u_path, M_TEMP);
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return (error);
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}
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opt.uio_iovcnt++;
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optiov[opt.uio_iovcnt].iov_base = "host.hostname";
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optiov[opt.uio_iovcnt].iov_len = sizeof("host.hostname");
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opt.uio_iovcnt++;
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optiov[opt.uio_iovcnt].iov_base = u_hostname;
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error = copyinstr(j->hostname, u_hostname, MAXHOSTNAMELEN,
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&optiov[opt.uio_iovcnt].iov_len);
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if (error) {
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free(u_path, M_TEMP);
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return (error);
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}
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opt.uio_iovcnt++;
|
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if (j->jailname != NULL) {
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optiov[opt.uio_iovcnt].iov_base = "name";
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optiov[opt.uio_iovcnt].iov_len = sizeof("name");
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|
opt.uio_iovcnt++;
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optiov[opt.uio_iovcnt].iov_base = u_name;
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error = copyinstr(j->jailname, u_name, MAXHOSTNAMELEN,
|
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&optiov[opt.uio_iovcnt].iov_len);
|
|
if (error) {
|
|
free(u_path, M_TEMP);
|
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return (error);
|
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}
|
|
opt.uio_iovcnt++;
|
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}
|
|
#ifdef INET
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|
optiov[opt.uio_iovcnt].iov_base = "ip4.addr";
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|
optiov[opt.uio_iovcnt].iov_len = sizeof("ip4.addr");
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opt.uio_iovcnt++;
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optiov[opt.uio_iovcnt].iov_base = u_ip4;
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optiov[opt.uio_iovcnt].iov_len = ip4s * sizeof(struct in_addr);
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if (j->version == 0)
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u_ip4->s_addr = j->ip4s;
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else {
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error = copyin(j->ip4, u_ip4, optiov[opt.uio_iovcnt].iov_len);
|
|
if (error) {
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|
free(u_path, M_TEMP);
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|
return (error);
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|
}
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|
}
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|
opt.uio_iovcnt++;
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#endif
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#ifdef INET6
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|
optiov[opt.uio_iovcnt].iov_base = "ip6.addr";
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|
optiov[opt.uio_iovcnt].iov_len = sizeof("ip6.addr");
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|
opt.uio_iovcnt++;
|
|
optiov[opt.uio_iovcnt].iov_base = u_ip6;
|
|
optiov[opt.uio_iovcnt].iov_len = j->ip6s * sizeof(struct in6_addr);
|
|
error = copyin(j->ip6, u_ip6, optiov[opt.uio_iovcnt].iov_len);
|
|
if (error) {
|
|
free(u_path, M_TEMP);
|
|
return (error);
|
|
}
|
|
opt.uio_iovcnt++;
|
|
#endif
|
|
KASSERT(opt.uio_iovcnt <= sizeof(optiov) / sizeof(optiov[0]),
|
|
("kern_jail: too many iovecs (%d)", opt.uio_iovcnt));
|
|
error = kern_jail_set(td, &opt, JAIL_CREATE | JAIL_ATTACH);
|
|
free(u_path, M_TEMP);
|
|
return (error);
|
|
}
|
|
|
|
|
|
/*
|
|
* struct jail_set_args {
|
|
* struct iovec *iovp;
|
|
* unsigned int iovcnt;
|
|
* int flags;
|
|
* };
|
|
*/
|
|
int
|
|
sys_jail_set(struct thread *td, struct jail_set_args *uap)
|
|
{
|
|
struct uio *auio;
|
|
int error;
|
|
|
|
/* Check that we have an even number of iovecs. */
|
|
if (uap->iovcnt & 1)
|
|
return (EINVAL);
|
|
|
|
error = copyinuio(uap->iovp, uap->iovcnt, &auio);
|
|
if (error)
|
|
return (error);
|
|
error = kern_jail_set(td, auio, uap->flags);
|
|
free(auio, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_jail_set(struct thread *td, struct uio *optuio, int flags)
|
|
{
|
|
struct nameidata nd;
|
|
#ifdef INET
|
|
struct in_addr *ip4;
|
|
#endif
|
|
#ifdef INET6
|
|
struct in6_addr *ip6;
|
|
#endif
|
|
struct vfsopt *opt;
|
|
struct vfsoptlist *opts;
|
|
struct prison *pr, *deadpr, *mypr, *ppr, *tpr;
|
|
struct vnode *root;
|
|
char *domain, *errmsg, *host, *name, *namelc, *p, *path, *uuid;
|
|
char *g_path;
|
|
#if defined(INET) || defined(INET6)
|
|
struct prison *tppr;
|
|
void *op;
|
|
#endif
|
|
unsigned long hid;
|
|
size_t namelen, onamelen;
|
|
int created, cuflags, descend, enforce, error, errmsg_len, errmsg_pos;
|
|
int gotchildmax, gotenforce, gothid, gotrsnum, gotslevel;
|
|
int fi, jid, jsys, len, level;
|
|
int childmax, rsnum, slevel, vfslocked;
|
|
int fullpath_disabled;
|
|
#if defined(INET) || defined(INET6)
|
|
int ii, ij;
|
|
#endif
|
|
#ifdef INET
|
|
int ip4s, redo_ip4;
|
|
#endif
|
|
#ifdef INET6
|
|
int ip6s, redo_ip6;
|
|
#endif
|
|
uint64_t pr_allow, ch_allow, pr_flags, ch_flags;
|
|
unsigned tallow;
|
|
char numbuf[12];
|
|
|
|
error = priv_check(td, PRIV_JAIL_SET);
|
|
if (!error && (flags & JAIL_ATTACH))
|
|
error = priv_check(td, PRIV_JAIL_ATTACH);
|
|
if (error)
|
|
return (error);
|
|
mypr = ppr = td->td_ucred->cr_prison;
|
|
if ((flags & JAIL_CREATE) && mypr->pr_childmax == 0)
|
|
return (EPERM);
|
|
if (flags & ~JAIL_SET_MASK)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Check all the parameters before committing to anything. Not all
|
|
* errors can be caught early, but we may as well try. Also, this
|
|
* takes care of some expensive stuff (path lookup) before getting
|
|
* the allprison lock.
|
|
*
|
|
* XXX Jails are not filesystems, and jail parameters are not mount
|
|
* options. But it makes more sense to re-use the vfsopt code
|
|
* than duplicate it under a different name.
|
|
*/
|
|
error = vfs_buildopts(optuio, &opts);
|
|
if (error)
|
|
return (error);
|
|
#ifdef INET
|
|
ip4 = NULL;
|
|
#endif
|
|
#ifdef INET6
|
|
ip6 = NULL;
|
|
#endif
|
|
g_path = NULL;
|
|
|
|
error = vfs_copyopt(opts, "jid", &jid, sizeof(jid));
|
|
if (error == ENOENT)
|
|
jid = 0;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
|
|
error = vfs_copyopt(opts, "securelevel", &slevel, sizeof(slevel));
|
|
if (error == ENOENT)
|
|
gotslevel = 0;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else
|
|
gotslevel = 1;
|
|
|
|
error =
|
|
vfs_copyopt(opts, "children.max", &childmax, sizeof(childmax));
|
|
if (error == ENOENT)
|
|
gotchildmax = 0;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else
|
|
gotchildmax = 1;
|
|
|
|
error = vfs_copyopt(opts, "enforce_statfs", &enforce, sizeof(enforce));
|
|
if (error == ENOENT)
|
|
gotenforce = 0;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else if (enforce < 0 || enforce > 2) {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
} else
|
|
gotenforce = 1;
|
|
|
|
error = vfs_copyopt(opts, "devfs_ruleset", &rsnum, sizeof(rsnum));
|
|
if (error == ENOENT)
|
|
gotrsnum = 0;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else
|
|
gotrsnum = 1;
|
|
|
|
pr_flags = ch_flags = 0;
|
|
for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]);
|
|
fi++) {
|
|
if (pr_flag_names[fi] == NULL)
|
|
continue;
|
|
vfs_flagopt(opts, pr_flag_names[fi], &pr_flags, 1 << fi);
|
|
vfs_flagopt(opts, pr_flag_nonames[fi], &ch_flags, 1 << fi);
|
|
}
|
|
ch_flags |= pr_flags;
|
|
for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]);
|
|
fi++) {
|
|
error = vfs_copyopt(opts, pr_flag_jailsys[fi].name, &jsys,
|
|
sizeof(jsys));
|
|
if (error == ENOENT)
|
|
continue;
|
|
if (error != 0)
|
|
goto done_free;
|
|
switch (jsys) {
|
|
case JAIL_SYS_DISABLE:
|
|
if (!pr_flag_jailsys[fi].disable) {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
pr_flags |= pr_flag_jailsys[fi].disable;
|
|
break;
|
|
case JAIL_SYS_NEW:
|
|
pr_flags |= pr_flag_jailsys[fi].new;
|
|
break;
|
|
case JAIL_SYS_INHERIT:
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
ch_flags |=
|
|
pr_flag_jailsys[fi].new | pr_flag_jailsys[fi].disable;
|
|
}
|
|
if ((flags & (JAIL_CREATE | JAIL_UPDATE | JAIL_ATTACH)) == JAIL_CREATE
|
|
&& !(pr_flags & PR_PERSIST)) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "new jail must persist or attach");
|
|
goto done_errmsg;
|
|
}
|
|
#ifdef VIMAGE
|
|
if ((flags & JAIL_UPDATE) && (ch_flags & PR_VNET)) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "vnet cannot be changed after creation");
|
|
goto done_errmsg;
|
|
}
|
|
#endif
|
|
#ifdef INET
|
|
if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP4_USER)) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "ip4 cannot be changed after creation");
|
|
goto done_errmsg;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if ((flags & JAIL_UPDATE) && (ch_flags & PR_IP6_USER)) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "ip6 cannot be changed after creation");
|
|
goto done_errmsg;
|
|
}
|
|
#endif
|
|
|
|
pr_allow = ch_allow = 0;
|
|
for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]);
|
|
fi++) {
|
|
vfs_flagopt(opts, pr_allow_names[fi], &pr_allow, 1 << fi);
|
|
vfs_flagopt(opts, pr_allow_nonames[fi], &ch_allow, 1 << fi);
|
|
}
|
|
ch_allow |= pr_allow;
|
|
|
|
error = vfs_getopt(opts, "name", (void **)&name, &len);
|
|
if (error == ENOENT)
|
|
name = NULL;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else {
|
|
if (len == 0 || name[len - 1] != '\0') {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
if (len > MAXHOSTNAMELEN) {
|
|
error = ENAMETOOLONG;
|
|
goto done_free;
|
|
}
|
|
}
|
|
|
|
error = vfs_getopt(opts, "host.hostname", (void **)&host, &len);
|
|
if (error == ENOENT)
|
|
host = NULL;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else {
|
|
ch_flags |= PR_HOST;
|
|
pr_flags |= PR_HOST;
|
|
if (len == 0 || host[len - 1] != '\0') {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
if (len > MAXHOSTNAMELEN) {
|
|
error = ENAMETOOLONG;
|
|
goto done_free;
|
|
}
|
|
}
|
|
|
|
error = vfs_getopt(opts, "host.domainname", (void **)&domain, &len);
|
|
if (error == ENOENT)
|
|
domain = NULL;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else {
|
|
ch_flags |= PR_HOST;
|
|
pr_flags |= PR_HOST;
|
|
if (len == 0 || domain[len - 1] != '\0') {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
if (len > MAXHOSTNAMELEN) {
|
|
error = ENAMETOOLONG;
|
|
goto done_free;
|
|
}
|
|
}
|
|
|
|
error = vfs_getopt(opts, "host.hostuuid", (void **)&uuid, &len);
|
|
if (error == ENOENT)
|
|
uuid = NULL;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else {
|
|
ch_flags |= PR_HOST;
|
|
pr_flags |= PR_HOST;
|
|
if (len == 0 || uuid[len - 1] != '\0') {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
if (len > HOSTUUIDLEN) {
|
|
error = ENAMETOOLONG;
|
|
goto done_free;
|
|
}
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
|
|
uint32_t hid32;
|
|
|
|
error = vfs_copyopt(opts, "host.hostid", &hid32, sizeof(hid32));
|
|
hid = hid32;
|
|
} else
|
|
#endif
|
|
error = vfs_copyopt(opts, "host.hostid", &hid, sizeof(hid));
|
|
if (error == ENOENT)
|
|
gothid = 0;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else {
|
|
gothid = 1;
|
|
ch_flags |= PR_HOST;
|
|
pr_flags |= PR_HOST;
|
|
}
|
|
|
|
#ifdef INET
|
|
error = vfs_getopt(opts, "ip4.addr", &op, &ip4s);
|
|
if (error == ENOENT)
|
|
ip4s = (pr_flags & PR_IP4_DISABLE) ? 0 : -1;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else if (ip4s & (sizeof(*ip4) - 1)) {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
} else {
|
|
ch_flags |= PR_IP4_USER | PR_IP4_DISABLE;
|
|
if (ip4s == 0)
|
|
pr_flags |= PR_IP4_USER | PR_IP4_DISABLE;
|
|
else {
|
|
pr_flags = (pr_flags & ~PR_IP4_DISABLE) | PR_IP4_USER;
|
|
ip4s /= sizeof(*ip4);
|
|
if (ip4s > jail_max_af_ips) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "too many IPv4 addresses");
|
|
goto done_errmsg;
|
|
}
|
|
ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK);
|
|
bcopy(op, ip4, ip4s * sizeof(*ip4));
|
|
/*
|
|
* IP addresses are all sorted but ip[0] to preserve
|
|
* the primary IP address as given from userland.
|
|
* This special IP is used for unbound outgoing
|
|
* connections as well for "loopback" traffic in case
|
|
* source address selection cannot find any more fitting
|
|
* address to connect from.
|
|
*/
|
|
if (ip4s > 1)
|
|
qsort(ip4 + 1, ip4s - 1, sizeof(*ip4), qcmp_v4);
|
|
/*
|
|
* Check for duplicate addresses and do some simple
|
|
* zero and broadcast checks. If users give other bogus
|
|
* addresses it is their problem.
|
|
*
|
|
* We do not have to care about byte order for these
|
|
* checks so we will do them in NBO.
|
|
*/
|
|
for (ii = 0; ii < ip4s; ii++) {
|
|
if (ip4[ii].s_addr == INADDR_ANY ||
|
|
ip4[ii].s_addr == INADDR_BROADCAST) {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
if ((ii+1) < ip4s &&
|
|
(ip4[0].s_addr == ip4[ii+1].s_addr ||
|
|
ip4[ii].s_addr == ip4[ii+1].s_addr)) {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
error = vfs_getopt(opts, "ip6.addr", &op, &ip6s);
|
|
if (error == ENOENT)
|
|
ip6s = (pr_flags & PR_IP6_DISABLE) ? 0 : -1;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else if (ip6s & (sizeof(*ip6) - 1)) {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
} else {
|
|
ch_flags |= PR_IP6_USER | PR_IP6_DISABLE;
|
|
if (ip6s == 0)
|
|
pr_flags |= PR_IP6_USER | PR_IP6_DISABLE;
|
|
else {
|
|
pr_flags = (pr_flags & ~PR_IP6_DISABLE) | PR_IP6_USER;
|
|
ip6s /= sizeof(*ip6);
|
|
if (ip6s > jail_max_af_ips) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "too many IPv6 addresses");
|
|
goto done_errmsg;
|
|
}
|
|
ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK);
|
|
bcopy(op, ip6, ip6s * sizeof(*ip6));
|
|
if (ip6s > 1)
|
|
qsort(ip6 + 1, ip6s - 1, sizeof(*ip6), qcmp_v6);
|
|
for (ii = 0; ii < ip6s; ii++) {
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&ip6[ii])) {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
if ((ii+1) < ip6s &&
|
|
(IN6_ARE_ADDR_EQUAL(&ip6[0], &ip6[ii+1]) ||
|
|
IN6_ARE_ADDR_EQUAL(&ip6[ii], &ip6[ii+1])))
|
|
{
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if defined(VIMAGE) && (defined(INET) || defined(INET6))
|
|
if ((ch_flags & PR_VNET) && (ch_flags & (PR_IP4_USER | PR_IP6_USER))) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts,
|
|
"vnet jails cannot have IP address restrictions");
|
|
goto done_errmsg;
|
|
}
|
|
#endif
|
|
|
|
fullpath_disabled = 0;
|
|
root = NULL;
|
|
error = vfs_getopt(opts, "path", (void **)&path, &len);
|
|
if (error == ENOENT)
|
|
path = NULL;
|
|
else if (error != 0)
|
|
goto done_free;
|
|
else {
|
|
if (flags & JAIL_UPDATE) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts,
|
|
"path cannot be changed after creation");
|
|
goto done_errmsg;
|
|
}
|
|
if (len == 0 || path[len - 1] != '\0') {
|
|
error = EINVAL;
|
|
goto done_free;
|
|
}
|
|
NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | MPSAFE, UIO_SYSSPACE,
|
|
path, td);
|
|
error = namei(&nd);
|
|
if (error)
|
|
goto done_free;
|
|
vfslocked = NDHASGIANT(&nd);
|
|
root = nd.ni_vp;
|
|
NDFREE(&nd, NDF_ONLY_PNBUF);
|
|
g_path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
|
|
strlcpy(g_path, path, MAXPATHLEN);
|
|
error = vn_path_to_global_path(td, root, g_path, MAXPATHLEN);
|
|
if (error == 0)
|
|
path = g_path;
|
|
else if (error == ENODEV) {
|
|
/* proceed if sysctl debug.disablefullpath == 1 */
|
|
fullpath_disabled = 1;
|
|
if (len < 2 || (len == 2 && path[0] == '/'))
|
|
path = NULL;
|
|
} else {
|
|
/* exit on other errors */
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
goto done_free;
|
|
}
|
|
if (root->v_type != VDIR) {
|
|
error = ENOTDIR;
|
|
vput(root);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
goto done_free;
|
|
}
|
|
VOP_UNLOCK(root, 0);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
if (fullpath_disabled) {
|
|
/* Leave room for a real-root full pathname. */
|
|
if (len + (path[0] == '/' && strcmp(mypr->pr_path, "/")
|
|
? strlen(mypr->pr_path) : 0) > MAXPATHLEN) {
|
|
error = ENAMETOOLONG;
|
|
goto done_free;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Grab the allprison lock before letting modules check their
|
|
* parameters. Once we have it, do not let go so we'll have a
|
|
* consistent view of the OSD list.
|
|
*/
|
|
sx_xlock(&allprison_lock);
|
|
error = osd_jail_call(NULL, PR_METHOD_CHECK, opts);
|
|
if (error)
|
|
goto done_unlock_list;
|
|
|
|
/* By now, all parameters should have been noted. */
|
|
TAILQ_FOREACH(opt, opts, link) {
|
|
if (!opt->seen && strcmp(opt->name, "errmsg")) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "unknown parameter: %s", opt->name);
|
|
goto done_unlock_list;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* See if we are creating a new record or updating an existing one.
|
|
* This abuses the file error codes ENOENT and EEXIST.
|
|
*/
|
|
cuflags = flags & (JAIL_CREATE | JAIL_UPDATE);
|
|
if (!cuflags) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "no valid operation (create or update)");
|
|
goto done_unlock_list;
|
|
}
|
|
pr = NULL;
|
|
namelc = NULL;
|
|
if (cuflags == JAIL_CREATE && jid == 0 && name != NULL) {
|
|
namelc = strrchr(name, '.');
|
|
jid = strtoul(namelc != NULL ? namelc + 1 : name, &p, 10);
|
|
if (*p != '\0')
|
|
jid = 0;
|
|
}
|
|
if (jid != 0) {
|
|
/*
|
|
* See if a requested jid already exists. There is an
|
|
* information leak here if the jid exists but is not within
|
|
* the caller's jail hierarchy. Jail creators will get EEXIST
|
|
* even though they cannot see the jail, and CREATE | UPDATE
|
|
* will return ENOENT which is not normally a valid error.
|
|
*/
|
|
if (jid < 0) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "negative jid");
|
|
goto done_unlock_list;
|
|
}
|
|
pr = prison_find(jid);
|
|
if (pr != NULL) {
|
|
ppr = pr->pr_parent;
|
|
/* Create: jid must not exist. */
|
|
if (cuflags == JAIL_CREATE) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
error = EEXIST;
|
|
vfs_opterror(opts, "jail %d already exists",
|
|
jid);
|
|
goto done_unlock_list;
|
|
}
|
|
if (!prison_ischild(mypr, pr)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
pr = NULL;
|
|
} else if (pr->pr_uref == 0) {
|
|
if (!(flags & JAIL_DYING)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "jail %d is dying",
|
|
jid);
|
|
goto done_unlock_list;
|
|
} else if ((flags & JAIL_ATTACH) ||
|
|
(pr_flags & PR_PERSIST)) {
|
|
/*
|
|
* A dying jail might be resurrected
|
|
* (via attach or persist), but first
|
|
* it must determine if another jail
|
|
* has claimed its name. Accomplish
|
|
* this by implicitly re-setting the
|
|
* name.
|
|
*/
|
|
if (name == NULL)
|
|
name = prison_name(mypr, pr);
|
|
}
|
|
}
|
|
}
|
|
if (pr == NULL) {
|
|
/* Update: jid must exist. */
|
|
if (cuflags == JAIL_UPDATE) {
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "jail %d not found", jid);
|
|
goto done_unlock_list;
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* If the caller provided a name, look for a jail by that name.
|
|
* This has different semantics for creates and updates keyed by jid
|
|
* (where the name must not already exist in a different jail),
|
|
* and updates keyed by the name itself (where the name must exist
|
|
* because that is the jail being updated).
|
|
*/
|
|
if (name != NULL) {
|
|
namelc = strrchr(name, '.');
|
|
if (namelc == NULL)
|
|
namelc = name;
|
|
else {
|
|
/*
|
|
* This is a hierarchical name. Split it into the
|
|
* parent and child names, and make sure the parent
|
|
* exists or matches an already found jail.
|
|
*/
|
|
*namelc = '\0';
|
|
if (pr != NULL) {
|
|
if (strncmp(name, ppr->pr_name, namelc - name)
|
|
|| ppr->pr_name[namelc - name] != '\0') {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
error = EINVAL;
|
|
vfs_opterror(opts,
|
|
"cannot change jail's parent");
|
|
goto done_unlock_list;
|
|
}
|
|
} else {
|
|
ppr = prison_find_name(mypr, name);
|
|
if (ppr == NULL) {
|
|
error = ENOENT;
|
|
vfs_opterror(opts,
|
|
"jail \"%s\" not found", name);
|
|
goto done_unlock_list;
|
|
}
|
|
mtx_unlock(&ppr->pr_mtx);
|
|
}
|
|
name = ++namelc;
|
|
}
|
|
if (name[0] != '\0') {
|
|
namelen =
|
|
(ppr == &prison0) ? 0 : strlen(ppr->pr_name) + 1;
|
|
name_again:
|
|
deadpr = NULL;
|
|
FOREACH_PRISON_CHILD(ppr, tpr) {
|
|
if (tpr != pr && tpr->pr_ref > 0 &&
|
|
!strcmp(tpr->pr_name + namelen, name)) {
|
|
if (pr == NULL &&
|
|
cuflags != JAIL_CREATE) {
|
|
mtx_lock(&tpr->pr_mtx);
|
|
if (tpr->pr_ref > 0) {
|
|
/*
|
|
* Use this jail
|
|
* for updates.
|
|
*/
|
|
if (tpr->pr_uref > 0) {
|
|
pr = tpr;
|
|
break;
|
|
}
|
|
deadpr = tpr;
|
|
}
|
|
mtx_unlock(&tpr->pr_mtx);
|
|
} else if (tpr->pr_uref > 0) {
|
|
/*
|
|
* Create, or update(jid):
|
|
* name must not exist in an
|
|
* active sibling jail.
|
|
*/
|
|
error = EEXIST;
|
|
if (pr != NULL)
|
|
mtx_unlock(&pr->pr_mtx);
|
|
vfs_opterror(opts,
|
|
"jail \"%s\" already exists",
|
|
name);
|
|
goto done_unlock_list;
|
|
}
|
|
}
|
|
}
|
|
/* If no active jail is found, use a dying one. */
|
|
if (deadpr != NULL && pr == NULL) {
|
|
if (flags & JAIL_DYING) {
|
|
mtx_lock(&deadpr->pr_mtx);
|
|
if (deadpr->pr_ref == 0) {
|
|
mtx_unlock(&deadpr->pr_mtx);
|
|
goto name_again;
|
|
}
|
|
pr = deadpr;
|
|
} else if (cuflags == JAIL_UPDATE) {
|
|
error = ENOENT;
|
|
vfs_opterror(opts,
|
|
"jail \"%s\" is dying", name);
|
|
goto done_unlock_list;
|
|
}
|
|
}
|
|
/* Update: name must exist if no jid. */
|
|
else if (cuflags == JAIL_UPDATE && pr == NULL) {
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "jail \"%s\" not found",
|
|
name);
|
|
goto done_unlock_list;
|
|
}
|
|
}
|
|
}
|
|
/* Update: must provide a jid or name. */
|
|
else if (cuflags == JAIL_UPDATE && pr == NULL) {
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "update specified no jail");
|
|
goto done_unlock_list;
|
|
}
|
|
|
|
/* If there's no prison to update, create a new one and link it in. */
|
|
if (pr == NULL) {
|
|
for (tpr = mypr; tpr != NULL; tpr = tpr->pr_parent)
|
|
if (tpr->pr_childcount >= tpr->pr_childmax) {
|
|
error = EPERM;
|
|
vfs_opterror(opts, "prison limit exceeded");
|
|
goto done_unlock_list;
|
|
}
|
|
created = 1;
|
|
mtx_lock(&ppr->pr_mtx);
|
|
if (ppr->pr_ref == 0 || (ppr->pr_flags & PR_REMOVE)) {
|
|
mtx_unlock(&ppr->pr_mtx);
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "parent jail went away!");
|
|
goto done_unlock_list;
|
|
}
|
|
ppr->pr_ref++;
|
|
ppr->pr_uref++;
|
|
mtx_unlock(&ppr->pr_mtx);
|
|
pr = malloc(sizeof(*pr), M_PRISON, M_WAITOK | M_ZERO);
|
|
if (jid == 0) {
|
|
/* Find the next free jid. */
|
|
jid = lastprid + 1;
|
|
findnext:
|
|
if (jid == JAIL_MAX)
|
|
jid = 1;
|
|
TAILQ_FOREACH(tpr, &allprison, pr_list) {
|
|
if (tpr->pr_id < jid)
|
|
continue;
|
|
if (tpr->pr_id > jid || tpr->pr_ref == 0) {
|
|
TAILQ_INSERT_BEFORE(tpr, pr, pr_list);
|
|
break;
|
|
}
|
|
if (jid == lastprid) {
|
|
error = EAGAIN;
|
|
vfs_opterror(opts,
|
|
"no available jail IDs");
|
|
free(pr, M_PRISON);
|
|
prison_deref(ppr, PD_DEREF |
|
|
PD_DEUREF | PD_LIST_XLOCKED);
|
|
goto done_releroot;
|
|
}
|
|
jid++;
|
|
goto findnext;
|
|
}
|
|
lastprid = jid;
|
|
} else {
|
|
/*
|
|
* The jail already has a jid (that did not yet exist),
|
|
* so just find where to insert it.
|
|
*/
|
|
TAILQ_FOREACH(tpr, &allprison, pr_list)
|
|
if (tpr->pr_id >= jid) {
|
|
TAILQ_INSERT_BEFORE(tpr, pr, pr_list);
|
|
break;
|
|
}
|
|
}
|
|
if (tpr == NULL)
|
|
TAILQ_INSERT_TAIL(&allprison, pr, pr_list);
|
|
LIST_INSERT_HEAD(&ppr->pr_children, pr, pr_sibling);
|
|
for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent)
|
|
tpr->pr_childcount++;
|
|
|
|
pr->pr_parent = ppr;
|
|
pr->pr_id = jid;
|
|
|
|
/* Set some default values, and inherit some from the parent. */
|
|
if (name == NULL)
|
|
name = "";
|
|
if (path == NULL) {
|
|
path = "/";
|
|
root = mypr->pr_root;
|
|
vref(root);
|
|
}
|
|
strlcpy(pr->pr_hostuuid, DEFAULT_HOSTUUID, HOSTUUIDLEN);
|
|
pr->pr_flags |= PR_HOST;
|
|
#if defined(INET) || defined(INET6)
|
|
#ifdef VIMAGE
|
|
if (!(pr_flags & PR_VNET))
|
|
#endif
|
|
{
|
|
#ifdef INET
|
|
if (!(ch_flags & PR_IP4_USER))
|
|
pr->pr_flags |=
|
|
PR_IP4 | PR_IP4_USER | PR_IP4_DISABLE;
|
|
else if (!(pr_flags & PR_IP4_USER)) {
|
|
pr->pr_flags |= ppr->pr_flags & PR_IP4;
|
|
if (ppr->pr_ip4 != NULL) {
|
|
pr->pr_ip4s = ppr->pr_ip4s;
|
|
pr->pr_ip4 = malloc(pr->pr_ip4s *
|
|
sizeof(struct in_addr), M_PRISON,
|
|
M_WAITOK);
|
|
bcopy(ppr->pr_ip4, pr->pr_ip4,
|
|
pr->pr_ip4s * sizeof(*pr->pr_ip4));
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (!(ch_flags & PR_IP6_USER))
|
|
pr->pr_flags |=
|
|
PR_IP6 | PR_IP6_USER | PR_IP6_DISABLE;
|
|
else if (!(pr_flags & PR_IP6_USER)) {
|
|
pr->pr_flags |= ppr->pr_flags & PR_IP6;
|
|
if (ppr->pr_ip6 != NULL) {
|
|
pr->pr_ip6s = ppr->pr_ip6s;
|
|
pr->pr_ip6 = malloc(pr->pr_ip6s *
|
|
sizeof(struct in6_addr), M_PRISON,
|
|
M_WAITOK);
|
|
bcopy(ppr->pr_ip6, pr->pr_ip6,
|
|
pr->pr_ip6s * sizeof(*pr->pr_ip6));
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
/* Source address selection is always on by default. */
|
|
pr->pr_flags |= _PR_IP_SADDRSEL;
|
|
|
|
pr->pr_securelevel = ppr->pr_securelevel;
|
|
pr->pr_allow = JAIL_DEFAULT_ALLOW & ppr->pr_allow;
|
|
pr->pr_enforce_statfs = JAIL_DEFAULT_ENFORCE_STATFS;
|
|
pr->pr_devfs_rsnum = JAIL_DEFAULT_DEVFS_RSNUM;
|
|
|
|
LIST_INIT(&pr->pr_children);
|
|
mtx_init(&pr->pr_mtx, "jail mutex", NULL, MTX_DEF | MTX_DUPOK);
|
|
|
|
#ifdef VIMAGE
|
|
/* Allocate a new vnet if specified. */
|
|
pr->pr_vnet = (pr_flags & PR_VNET)
|
|
? vnet_alloc() : ppr->pr_vnet;
|
|
#endif
|
|
/*
|
|
* Allocate a dedicated cpuset for each jail.
|
|
* Unlike other initial settings, this may return an erorr.
|
|
*/
|
|
error = cpuset_create_root(ppr, &pr->pr_cpuset);
|
|
if (error) {
|
|
prison_deref(pr, PD_LIST_XLOCKED);
|
|
goto done_releroot;
|
|
}
|
|
|
|
mtx_lock(&pr->pr_mtx);
|
|
/*
|
|
* New prisons do not yet have a reference, because we do not
|
|
* want other to see the incomplete prison once the
|
|
* allprison_lock is downgraded.
|
|
*/
|
|
} else {
|
|
created = 0;
|
|
/*
|
|
* Grab a reference for existing prisons, to ensure they
|
|
* continue to exist for the duration of the call.
|
|
*/
|
|
pr->pr_ref++;
|
|
#if defined(VIMAGE) && (defined(INET) || defined(INET6))
|
|
if ((pr->pr_flags & PR_VNET) &&
|
|
(ch_flags & (PR_IP4_USER | PR_IP6_USER))) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts,
|
|
"vnet jails cannot have IP address restrictions");
|
|
goto done_deref_locked;
|
|
}
|
|
#endif
|
|
#ifdef INET
|
|
if (PR_IP4_USER & ch_flags & (pr_flags ^ pr->pr_flags)) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts,
|
|
"ip4 cannot be changed after creation");
|
|
goto done_deref_locked;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (PR_IP6_USER & ch_flags & (pr_flags ^ pr->pr_flags)) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts,
|
|
"ip6 cannot be changed after creation");
|
|
goto done_deref_locked;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* Do final error checking before setting anything. */
|
|
if (gotslevel) {
|
|
if (slevel < ppr->pr_securelevel) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
}
|
|
}
|
|
if (gotchildmax) {
|
|
if (childmax >= ppr->pr_childmax) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
}
|
|
}
|
|
if (gotenforce) {
|
|
if (enforce < ppr->pr_enforce_statfs) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
}
|
|
}
|
|
if (gotrsnum) {
|
|
/*
|
|
* devfs_rsnum is a uint16_t
|
|
* value of -1 disables devfs mounts
|
|
*/
|
|
if (rsnum < -1 || rsnum > 65535) {
|
|
error = EINVAL;
|
|
goto done_deref_locked;
|
|
}
|
|
/*
|
|
* Nested jails may inherit parent's devfs ruleset
|
|
* or disable devfs
|
|
*/
|
|
if (jailed(td->td_ucred)) {
|
|
if (rsnum > 0 && rsnum != ppr->pr_devfs_rsnum) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
} else if (rsnum == 0)
|
|
rsnum = ppr->pr_devfs_rsnum;
|
|
}
|
|
}
|
|
#ifdef INET
|
|
if (ip4s > 0) {
|
|
if (ppr->pr_flags & PR_IP4) {
|
|
/*
|
|
* Make sure the new set of IP addresses is a
|
|
* subset of the parent's list. Don't worry
|
|
* about the parent being unlocked, as any
|
|
* setting is done with allprison_lock held.
|
|
*/
|
|
for (ij = 0; ij < ppr->pr_ip4s; ij++)
|
|
if (ip4[0].s_addr == ppr->pr_ip4[ij].s_addr)
|
|
break;
|
|
if (ij == ppr->pr_ip4s) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
}
|
|
if (ip4s > 1) {
|
|
for (ii = ij = 1; ii < ip4s; ii++) {
|
|
if (ip4[ii].s_addr ==
|
|
ppr->pr_ip4[0].s_addr)
|
|
continue;
|
|
for (; ij < ppr->pr_ip4s; ij++)
|
|
if (ip4[ii].s_addr ==
|
|
ppr->pr_ip4[ij].s_addr)
|
|
break;
|
|
if (ij == ppr->pr_ip4s)
|
|
break;
|
|
}
|
|
if (ij == ppr->pr_ip4s) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* Check for conflicting IP addresses. We permit them
|
|
* if there is no more than one IP on each jail. If
|
|
* there is a duplicate on a jail with more than one
|
|
* IP stop checking and return error.
|
|
*/
|
|
tppr = ppr;
|
|
#ifdef VIMAGE
|
|
for (; tppr != &prison0; tppr = tppr->pr_parent)
|
|
if (tppr->pr_flags & PR_VNET)
|
|
break;
|
|
#endif
|
|
FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) {
|
|
if (tpr == pr ||
|
|
#ifdef VIMAGE
|
|
(tpr != tppr && (tpr->pr_flags & PR_VNET)) ||
|
|
#endif
|
|
tpr->pr_uref == 0) {
|
|
descend = 0;
|
|
continue;
|
|
}
|
|
if (!(tpr->pr_flags & PR_IP4_USER))
|
|
continue;
|
|
descend = 0;
|
|
if (tpr->pr_ip4 == NULL ||
|
|
(ip4s == 1 && tpr->pr_ip4s == 1))
|
|
continue;
|
|
for (ii = 0; ii < ip4s; ii++) {
|
|
if (_prison_check_ip4(tpr, &ip4[ii]) == 0) {
|
|
error = EADDRINUSE;
|
|
vfs_opterror(opts,
|
|
"IPv4 addresses clash");
|
|
goto done_deref_locked;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (ip6s > 0) {
|
|
if (ppr->pr_flags & PR_IP6) {
|
|
/*
|
|
* Make sure the new set of IP addresses is a
|
|
* subset of the parent's list.
|
|
*/
|
|
for (ij = 0; ij < ppr->pr_ip6s; ij++)
|
|
if (IN6_ARE_ADDR_EQUAL(&ip6[0],
|
|
&ppr->pr_ip6[ij]))
|
|
break;
|
|
if (ij == ppr->pr_ip6s) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
}
|
|
if (ip6s > 1) {
|
|
for (ii = ij = 1; ii < ip6s; ii++) {
|
|
if (IN6_ARE_ADDR_EQUAL(&ip6[ii],
|
|
&ppr->pr_ip6[0]))
|
|
continue;
|
|
for (; ij < ppr->pr_ip6s; ij++)
|
|
if (IN6_ARE_ADDR_EQUAL(
|
|
&ip6[ii], &ppr->pr_ip6[ij]))
|
|
break;
|
|
if (ij == ppr->pr_ip6s)
|
|
break;
|
|
}
|
|
if (ij == ppr->pr_ip6s) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
}
|
|
}
|
|
}
|
|
/* Check for conflicting IP addresses. */
|
|
tppr = ppr;
|
|
#ifdef VIMAGE
|
|
for (; tppr != &prison0; tppr = tppr->pr_parent)
|
|
if (tppr->pr_flags & PR_VNET)
|
|
break;
|
|
#endif
|
|
FOREACH_PRISON_DESCENDANT(tppr, tpr, descend) {
|
|
if (tpr == pr ||
|
|
#ifdef VIMAGE
|
|
(tpr != tppr && (tpr->pr_flags & PR_VNET)) ||
|
|
#endif
|
|
tpr->pr_uref == 0) {
|
|
descend = 0;
|
|
continue;
|
|
}
|
|
if (!(tpr->pr_flags & PR_IP6_USER))
|
|
continue;
|
|
descend = 0;
|
|
if (tpr->pr_ip6 == NULL ||
|
|
(ip6s == 1 && tpr->pr_ip6s == 1))
|
|
continue;
|
|
for (ii = 0; ii < ip6s; ii++) {
|
|
if (_prison_check_ip6(tpr, &ip6[ii]) == 0) {
|
|
error = EADDRINUSE;
|
|
vfs_opterror(opts,
|
|
"IPv6 addresses clash");
|
|
goto done_deref_locked;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
onamelen = namelen = 0;
|
|
if (name != NULL) {
|
|
/* Give a default name of the jid. */
|
|
if (name[0] == '\0')
|
|
snprintf(name = numbuf, sizeof(numbuf), "%d", jid);
|
|
else if (*namelc == '0' || (strtoul(namelc, &p, 10) != jid &&
|
|
*p == '\0')) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts,
|
|
"name cannot be numeric (unless it is the jid)");
|
|
goto done_deref_locked;
|
|
}
|
|
/*
|
|
* Make sure the name isn't too long for the prison or its
|
|
* children.
|
|
*/
|
|
onamelen = strlen(pr->pr_name);
|
|
namelen = strlen(name);
|
|
if (strlen(ppr->pr_name) + namelen + 2 > sizeof(pr->pr_name)) {
|
|
error = ENAMETOOLONG;
|
|
goto done_deref_locked;
|
|
}
|
|
FOREACH_PRISON_DESCENDANT(pr, tpr, descend) {
|
|
if (strlen(tpr->pr_name) + (namelen - onamelen) >=
|
|
sizeof(pr->pr_name)) {
|
|
error = ENAMETOOLONG;
|
|
goto done_deref_locked;
|
|
}
|
|
}
|
|
}
|
|
if (pr_allow & ~ppr->pr_allow) {
|
|
error = EPERM;
|
|
goto done_deref_locked;
|
|
}
|
|
|
|
/* Set the parameters of the prison. */
|
|
#ifdef INET
|
|
redo_ip4 = 0;
|
|
if (pr_flags & PR_IP4_USER) {
|
|
pr->pr_flags |= PR_IP4;
|
|
free(pr->pr_ip4, M_PRISON);
|
|
pr->pr_ip4s = ip4s;
|
|
pr->pr_ip4 = ip4;
|
|
ip4 = NULL;
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) {
|
|
#ifdef VIMAGE
|
|
if (tpr->pr_flags & PR_VNET) {
|
|
descend = 0;
|
|
continue;
|
|
}
|
|
#endif
|
|
if (prison_restrict_ip4(tpr, NULL)) {
|
|
redo_ip4 = 1;
|
|
descend = 0;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
redo_ip6 = 0;
|
|
if (pr_flags & PR_IP6_USER) {
|
|
pr->pr_flags |= PR_IP6;
|
|
free(pr->pr_ip6, M_PRISON);
|
|
pr->pr_ip6s = ip6s;
|
|
pr->pr_ip6 = ip6;
|
|
ip6 = NULL;
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) {
|
|
#ifdef VIMAGE
|
|
if (tpr->pr_flags & PR_VNET) {
|
|
descend = 0;
|
|
continue;
|
|
}
|
|
#endif
|
|
if (prison_restrict_ip6(tpr, NULL)) {
|
|
redo_ip6 = 1;
|
|
descend = 0;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
if (gotslevel) {
|
|
pr->pr_securelevel = slevel;
|
|
/* Set all child jails to be at least this level. */
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend)
|
|
if (tpr->pr_securelevel < slevel)
|
|
tpr->pr_securelevel = slevel;
|
|
}
|
|
if (gotchildmax) {
|
|
pr->pr_childmax = childmax;
|
|
/* Set all child jails to under this limit. */
|
|
FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(pr, tpr, descend, level)
|
|
if (tpr->pr_childmax > childmax - level)
|
|
tpr->pr_childmax = childmax > level
|
|
? childmax - level : 0;
|
|
}
|
|
if (gotenforce) {
|
|
pr->pr_enforce_statfs = enforce;
|
|
/* Pass this restriction on to the children. */
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend)
|
|
if (tpr->pr_enforce_statfs < enforce)
|
|
tpr->pr_enforce_statfs = enforce;
|
|
}
|
|
if (gotrsnum) {
|
|
pr->pr_devfs_rsnum = rsnum;
|
|
/* Pass this restriction on to the children. */
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend)
|
|
if (tpr->pr_devfs_rsnum != -1)
|
|
tpr->pr_devfs_rsnum = rsnum;
|
|
}
|
|
if (name != NULL) {
|
|
if (ppr == &prison0)
|
|
strlcpy(pr->pr_name, name, sizeof(pr->pr_name));
|
|
else
|
|
snprintf(pr->pr_name, sizeof(pr->pr_name), "%s.%s",
|
|
ppr->pr_name, name);
|
|
/* Change this component of child names. */
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) {
|
|
bcopy(tpr->pr_name + onamelen, tpr->pr_name + namelen,
|
|
strlen(tpr->pr_name + onamelen) + 1);
|
|
bcopy(pr->pr_name, tpr->pr_name, namelen);
|
|
}
|
|
}
|
|
if (path != NULL) {
|
|
/* Try to keep a real-rooted full pathname. */
|
|
if (fullpath_disabled && path[0] == '/' &&
|
|
strcmp(mypr->pr_path, "/"))
|
|
snprintf(pr->pr_path, sizeof(pr->pr_path), "%s%s",
|
|
mypr->pr_path, path);
|
|
else
|
|
strlcpy(pr->pr_path, path, sizeof(pr->pr_path));
|
|
pr->pr_root = root;
|
|
}
|
|
if (PR_HOST & ch_flags & ~pr_flags) {
|
|
if (pr->pr_flags & PR_HOST) {
|
|
/*
|
|
* Copy the parent's host info. As with pr_ip4 above,
|
|
* the lack of a lock on the parent is not a problem;
|
|
* it is always set with allprison_lock at least
|
|
* shared, and is held exclusively here.
|
|
*/
|
|
strlcpy(pr->pr_hostname, pr->pr_parent->pr_hostname,
|
|
sizeof(pr->pr_hostname));
|
|
strlcpy(pr->pr_domainname, pr->pr_parent->pr_domainname,
|
|
sizeof(pr->pr_domainname));
|
|
strlcpy(pr->pr_hostuuid, pr->pr_parent->pr_hostuuid,
|
|
sizeof(pr->pr_hostuuid));
|
|
pr->pr_hostid = pr->pr_parent->pr_hostid;
|
|
}
|
|
} else if (host != NULL || domain != NULL || uuid != NULL || gothid) {
|
|
/* Set this prison, and any descendants without PR_HOST. */
|
|
if (host != NULL)
|
|
strlcpy(pr->pr_hostname, host, sizeof(pr->pr_hostname));
|
|
if (domain != NULL)
|
|
strlcpy(pr->pr_domainname, domain,
|
|
sizeof(pr->pr_domainname));
|
|
if (uuid != NULL)
|
|
strlcpy(pr->pr_hostuuid, uuid, sizeof(pr->pr_hostuuid));
|
|
if (gothid)
|
|
pr->pr_hostid = hid;
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) {
|
|
if (tpr->pr_flags & PR_HOST)
|
|
descend = 0;
|
|
else {
|
|
if (host != NULL)
|
|
strlcpy(tpr->pr_hostname,
|
|
pr->pr_hostname,
|
|
sizeof(tpr->pr_hostname));
|
|
if (domain != NULL)
|
|
strlcpy(tpr->pr_domainname,
|
|
pr->pr_domainname,
|
|
sizeof(tpr->pr_domainname));
|
|
if (uuid != NULL)
|
|
strlcpy(tpr->pr_hostuuid,
|
|
pr->pr_hostuuid,
|
|
sizeof(tpr->pr_hostuuid));
|
|
if (gothid)
|
|
tpr->pr_hostid = hid;
|
|
}
|
|
}
|
|
}
|
|
if ((tallow = ch_allow & ~pr_allow)) {
|
|
/* Clear allow bits in all children. */
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend)
|
|
tpr->pr_allow &= ~tallow;
|
|
}
|
|
pr->pr_allow = (pr->pr_allow & ~ch_allow) | pr_allow;
|
|
/*
|
|
* Persistent prisons get an extra reference, and prisons losing their
|
|
* persist flag lose that reference. Only do this for existing prisons
|
|
* for now, so new ones will remain unseen until after the module
|
|
* handlers have completed.
|
|
*/
|
|
if (!created && (ch_flags & PR_PERSIST & (pr_flags ^ pr->pr_flags))) {
|
|
if (pr_flags & PR_PERSIST) {
|
|
pr->pr_ref++;
|
|
pr->pr_uref++;
|
|
} else {
|
|
pr->pr_ref--;
|
|
pr->pr_uref--;
|
|
}
|
|
}
|
|
pr->pr_flags = (pr->pr_flags & ~ch_flags) | pr_flags;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
|
|
#ifdef RACCT
|
|
if (created)
|
|
prison_racct_attach(pr);
|
|
#endif
|
|
|
|
/* Locks may have prevented a complete restriction of child IP
|
|
* addresses. If so, allocate some more memory and try again.
|
|
*/
|
|
#ifdef INET
|
|
while (redo_ip4) {
|
|
ip4s = pr->pr_ip4s;
|
|
ip4 = malloc(ip4s * sizeof(*ip4), M_PRISON, M_WAITOK);
|
|
mtx_lock(&pr->pr_mtx);
|
|
redo_ip4 = 0;
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) {
|
|
#ifdef VIMAGE
|
|
if (tpr->pr_flags & PR_VNET) {
|
|
descend = 0;
|
|
continue;
|
|
}
|
|
#endif
|
|
if (prison_restrict_ip4(tpr, ip4)) {
|
|
if (ip4 != NULL)
|
|
ip4 = NULL;
|
|
else
|
|
redo_ip4 = 1;
|
|
}
|
|
}
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
while (redo_ip6) {
|
|
ip6s = pr->pr_ip6s;
|
|
ip6 = malloc(ip6s * sizeof(*ip6), M_PRISON, M_WAITOK);
|
|
mtx_lock(&pr->pr_mtx);
|
|
redo_ip6 = 0;
|
|
FOREACH_PRISON_DESCENDANT_LOCKED(pr, tpr, descend) {
|
|
#ifdef VIMAGE
|
|
if (tpr->pr_flags & PR_VNET) {
|
|
descend = 0;
|
|
continue;
|
|
}
|
|
#endif
|
|
if (prison_restrict_ip6(tpr, ip6)) {
|
|
if (ip6 != NULL)
|
|
ip6 = NULL;
|
|
else
|
|
redo_ip6 = 1;
|
|
}
|
|
}
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
#endif
|
|
|
|
/* Let the modules do their work. */
|
|
sx_downgrade(&allprison_lock);
|
|
if (created) {
|
|
error = osd_jail_call(pr, PR_METHOD_CREATE, opts);
|
|
if (error) {
|
|
prison_deref(pr, PD_LIST_SLOCKED);
|
|
goto done_errmsg;
|
|
}
|
|
}
|
|
error = osd_jail_call(pr, PR_METHOD_SET, opts);
|
|
if (error) {
|
|
prison_deref(pr, created
|
|
? PD_LIST_SLOCKED
|
|
: PD_DEREF | PD_LIST_SLOCKED);
|
|
goto done_errmsg;
|
|
}
|
|
|
|
/* Attach this process to the prison if requested. */
|
|
if (flags & JAIL_ATTACH) {
|
|
mtx_lock(&pr->pr_mtx);
|
|
error = do_jail_attach(td, pr);
|
|
if (error) {
|
|
vfs_opterror(opts, "attach failed");
|
|
if (!created)
|
|
prison_deref(pr, PD_DEREF);
|
|
goto done_errmsg;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now that it is all there, drop the temporary reference from existing
|
|
* prisons. Or add a reference to newly created persistent prisons
|
|
* (which was not done earlier so that the prison would not be publicly
|
|
* visible).
|
|
*/
|
|
if (!created) {
|
|
prison_deref(pr, (flags & JAIL_ATTACH)
|
|
? PD_DEREF
|
|
: PD_DEREF | PD_LIST_SLOCKED);
|
|
} else {
|
|
if (pr_flags & PR_PERSIST) {
|
|
mtx_lock(&pr->pr_mtx);
|
|
pr->pr_ref++;
|
|
pr->pr_uref++;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
if (!(flags & JAIL_ATTACH))
|
|
sx_sunlock(&allprison_lock);
|
|
}
|
|
td->td_retval[0] = pr->pr_id;
|
|
goto done_errmsg;
|
|
|
|
done_deref_locked:
|
|
prison_deref(pr, created
|
|
? PD_LOCKED | PD_LIST_XLOCKED
|
|
: PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED);
|
|
goto done_releroot;
|
|
done_unlock_list:
|
|
sx_xunlock(&allprison_lock);
|
|
done_releroot:
|
|
if (root != NULL) {
|
|
vfslocked = VFS_LOCK_GIANT(root->v_mount);
|
|
vrele(root);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
}
|
|
done_errmsg:
|
|
if (error) {
|
|
vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len);
|
|
if (errmsg_len > 0) {
|
|
errmsg_pos = 2 * vfs_getopt_pos(opts, "errmsg") + 1;
|
|
if (errmsg_pos > 0) {
|
|
if (optuio->uio_segflg == UIO_SYSSPACE)
|
|
bcopy(errmsg,
|
|
optuio->uio_iov[errmsg_pos].iov_base,
|
|
errmsg_len);
|
|
else
|
|
copyout(errmsg,
|
|
optuio->uio_iov[errmsg_pos].iov_base,
|
|
errmsg_len);
|
|
}
|
|
}
|
|
}
|
|
done_free:
|
|
#ifdef INET
|
|
free(ip4, M_PRISON);
|
|
#endif
|
|
#ifdef INET6
|
|
free(ip6, M_PRISON);
|
|
#endif
|
|
if (g_path != NULL)
|
|
free(g_path, M_TEMP);
|
|
vfs_freeopts(opts);
|
|
return (error);
|
|
}
|
|
|
|
|
|
/*
|
|
* struct jail_get_args {
|
|
* struct iovec *iovp;
|
|
* unsigned int iovcnt;
|
|
* int flags;
|
|
* };
|
|
*/
|
|
int
|
|
sys_jail_get(struct thread *td, struct jail_get_args *uap)
|
|
{
|
|
struct uio *auio;
|
|
int error;
|
|
|
|
/* Check that we have an even number of iovecs. */
|
|
if (uap->iovcnt & 1)
|
|
return (EINVAL);
|
|
|
|
error = copyinuio(uap->iovp, uap->iovcnt, &auio);
|
|
if (error)
|
|
return (error);
|
|
error = kern_jail_get(td, auio, uap->flags);
|
|
if (error == 0)
|
|
error = copyout(auio->uio_iov, uap->iovp,
|
|
uap->iovcnt * sizeof (struct iovec));
|
|
free(auio, M_IOV);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
kern_jail_get(struct thread *td, struct uio *optuio, int flags)
|
|
{
|
|
struct prison *pr, *mypr;
|
|
struct vfsopt *opt;
|
|
struct vfsoptlist *opts;
|
|
char *errmsg, *name;
|
|
int error, errmsg_len, errmsg_pos, fi, i, jid, len, locked, pos;
|
|
|
|
if (flags & ~JAIL_GET_MASK)
|
|
return (EINVAL);
|
|
|
|
/* Get the parameter list. */
|
|
error = vfs_buildopts(optuio, &opts);
|
|
if (error)
|
|
return (error);
|
|
errmsg_pos = vfs_getopt_pos(opts, "errmsg");
|
|
mypr = td->td_ucred->cr_prison;
|
|
|
|
/*
|
|
* Find the prison specified by one of: lastjid, jid, name.
|
|
*/
|
|
sx_slock(&allprison_lock);
|
|
error = vfs_copyopt(opts, "lastjid", &jid, sizeof(jid));
|
|
if (error == 0) {
|
|
TAILQ_FOREACH(pr, &allprison, pr_list) {
|
|
if (pr->pr_id > jid && prison_ischild(mypr, pr)) {
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (pr->pr_ref > 0 &&
|
|
(pr->pr_uref > 0 || (flags & JAIL_DYING)))
|
|
break;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
}
|
|
if (pr != NULL)
|
|
goto found_prison;
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "no jail after %d", jid);
|
|
goto done_unlock_list;
|
|
} else if (error != ENOENT)
|
|
goto done_unlock_list;
|
|
|
|
error = vfs_copyopt(opts, "jid", &jid, sizeof(jid));
|
|
if (error == 0) {
|
|
if (jid != 0) {
|
|
pr = prison_find_child(mypr, jid);
|
|
if (pr != NULL) {
|
|
if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "jail %d is dying",
|
|
jid);
|
|
goto done_unlock_list;
|
|
}
|
|
goto found_prison;
|
|
}
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "jail %d not found", jid);
|
|
goto done_unlock_list;
|
|
}
|
|
} else if (error != ENOENT)
|
|
goto done_unlock_list;
|
|
|
|
error = vfs_getopt(opts, "name", (void **)&name, &len);
|
|
if (error == 0) {
|
|
if (len == 0 || name[len - 1] != '\0') {
|
|
error = EINVAL;
|
|
goto done_unlock_list;
|
|
}
|
|
pr = prison_find_name(mypr, name);
|
|
if (pr != NULL) {
|
|
if (pr->pr_uref == 0 && !(flags & JAIL_DYING)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "jail \"%s\" is dying",
|
|
name);
|
|
goto done_unlock_list;
|
|
}
|
|
goto found_prison;
|
|
}
|
|
error = ENOENT;
|
|
vfs_opterror(opts, "jail \"%s\" not found", name);
|
|
goto done_unlock_list;
|
|
} else if (error != ENOENT)
|
|
goto done_unlock_list;
|
|
|
|
vfs_opterror(opts, "no jail specified");
|
|
error = ENOENT;
|
|
goto done_unlock_list;
|
|
|
|
found_prison:
|
|
/* Get the parameters of the prison. */
|
|
pr->pr_ref++;
|
|
locked = PD_LOCKED;
|
|
td->td_retval[0] = pr->pr_id;
|
|
error = vfs_setopt(opts, "jid", &pr->pr_id, sizeof(pr->pr_id));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
i = (pr->pr_parent == mypr) ? 0 : pr->pr_parent->pr_id;
|
|
error = vfs_setopt(opts, "parent", &i, sizeof(i));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopts(opts, "name", prison_name(mypr, pr));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopt(opts, "cpuset.id", &pr->pr_cpuset->cs_id,
|
|
sizeof(pr->pr_cpuset->cs_id));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopts(opts, "path", prison_path(mypr, pr));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
#ifdef INET
|
|
error = vfs_setopt_part(opts, "ip4.addr", pr->pr_ip4,
|
|
pr->pr_ip4s * sizeof(*pr->pr_ip4));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
#endif
|
|
#ifdef INET6
|
|
error = vfs_setopt_part(opts, "ip6.addr", pr->pr_ip6,
|
|
pr->pr_ip6s * sizeof(*pr->pr_ip6));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
#endif
|
|
error = vfs_setopt(opts, "securelevel", &pr->pr_securelevel,
|
|
sizeof(pr->pr_securelevel));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopt(opts, "children.cur", &pr->pr_childcount,
|
|
sizeof(pr->pr_childcount));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopt(opts, "children.max", &pr->pr_childmax,
|
|
sizeof(pr->pr_childmax));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopts(opts, "host.hostname", pr->pr_hostname);
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopts(opts, "host.domainname", pr->pr_domainname);
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopts(opts, "host.hostuuid", pr->pr_hostuuid);
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
#ifdef COMPAT_FREEBSD32
|
|
if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) {
|
|
uint32_t hid32 = pr->pr_hostid;
|
|
|
|
error = vfs_setopt(opts, "host.hostid", &hid32, sizeof(hid32));
|
|
} else
|
|
#endif
|
|
error = vfs_setopt(opts, "host.hostid", &pr->pr_hostid,
|
|
sizeof(pr->pr_hostid));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopt(opts, "enforce_statfs", &pr->pr_enforce_statfs,
|
|
sizeof(pr->pr_enforce_statfs));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
error = vfs_setopt(opts, "devfs_ruleset", &pr->pr_devfs_rsnum,
|
|
sizeof(pr->pr_devfs_rsnum));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]);
|
|
fi++) {
|
|
if (pr_flag_names[fi] == NULL)
|
|
continue;
|
|
i = (pr->pr_flags & (1 << fi)) ? 1 : 0;
|
|
error = vfs_setopt(opts, pr_flag_names[fi], &i, sizeof(i));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
i = !i;
|
|
error = vfs_setopt(opts, pr_flag_nonames[fi], &i, sizeof(i));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
}
|
|
for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]);
|
|
fi++) {
|
|
i = pr->pr_flags &
|
|
(pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new);
|
|
i = pr_flag_jailsys[fi].disable &&
|
|
(i == pr_flag_jailsys[fi].disable) ? JAIL_SYS_DISABLE
|
|
: (i == pr_flag_jailsys[fi].new) ? JAIL_SYS_NEW
|
|
: JAIL_SYS_INHERIT;
|
|
error =
|
|
vfs_setopt(opts, pr_flag_jailsys[fi].name, &i, sizeof(i));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
}
|
|
for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]);
|
|
fi++) {
|
|
if (pr_allow_names[fi] == NULL)
|
|
continue;
|
|
i = (pr->pr_allow & (1 << fi)) ? 1 : 0;
|
|
error = vfs_setopt(opts, pr_allow_names[fi], &i, sizeof(i));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
i = !i;
|
|
error = vfs_setopt(opts, pr_allow_nonames[fi], &i, sizeof(i));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
}
|
|
i = (pr->pr_uref == 0);
|
|
error = vfs_setopt(opts, "dying", &i, sizeof(i));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
i = !i;
|
|
error = vfs_setopt(opts, "nodying", &i, sizeof(i));
|
|
if (error != 0 && error != ENOENT)
|
|
goto done_deref;
|
|
|
|
/* Get the module parameters. */
|
|
mtx_unlock(&pr->pr_mtx);
|
|
locked = 0;
|
|
error = osd_jail_call(pr, PR_METHOD_GET, opts);
|
|
if (error)
|
|
goto done_deref;
|
|
prison_deref(pr, PD_DEREF | PD_LIST_SLOCKED);
|
|
|
|
/* By now, all parameters should have been noted. */
|
|
TAILQ_FOREACH(opt, opts, link) {
|
|
if (!opt->seen && strcmp(opt->name, "errmsg")) {
|
|
error = EINVAL;
|
|
vfs_opterror(opts, "unknown parameter: %s", opt->name);
|
|
goto done_errmsg;
|
|
}
|
|
}
|
|
|
|
/* Write the fetched parameters back to userspace. */
|
|
error = 0;
|
|
TAILQ_FOREACH(opt, opts, link) {
|
|
if (opt->pos >= 0 && opt->pos != errmsg_pos) {
|
|
pos = 2 * opt->pos + 1;
|
|
optuio->uio_iov[pos].iov_len = opt->len;
|
|
if (opt->value != NULL) {
|
|
if (optuio->uio_segflg == UIO_SYSSPACE) {
|
|
bcopy(opt->value,
|
|
optuio->uio_iov[pos].iov_base,
|
|
opt->len);
|
|
} else {
|
|
error = copyout(opt->value,
|
|
optuio->uio_iov[pos].iov_base,
|
|
opt->len);
|
|
if (error)
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
goto done_errmsg;
|
|
|
|
done_deref:
|
|
prison_deref(pr, locked | PD_DEREF | PD_LIST_SLOCKED);
|
|
goto done_errmsg;
|
|
|
|
done_unlock_list:
|
|
sx_sunlock(&allprison_lock);
|
|
done_errmsg:
|
|
if (error && errmsg_pos >= 0) {
|
|
vfs_getopt(opts, "errmsg", (void **)&errmsg, &errmsg_len);
|
|
errmsg_pos = 2 * errmsg_pos + 1;
|
|
if (errmsg_len > 0) {
|
|
if (optuio->uio_segflg == UIO_SYSSPACE)
|
|
bcopy(errmsg,
|
|
optuio->uio_iov[errmsg_pos].iov_base,
|
|
errmsg_len);
|
|
else
|
|
copyout(errmsg,
|
|
optuio->uio_iov[errmsg_pos].iov_base,
|
|
errmsg_len);
|
|
}
|
|
}
|
|
vfs_freeopts(opts);
|
|
return (error);
|
|
}
|
|
|
|
|
|
/*
|
|
* struct jail_remove_args {
|
|
* int jid;
|
|
* };
|
|
*/
|
|
int
|
|
sys_jail_remove(struct thread *td, struct jail_remove_args *uap)
|
|
{
|
|
struct prison *pr, *cpr, *lpr, *tpr;
|
|
int descend, error;
|
|
|
|
error = priv_check(td, PRIV_JAIL_REMOVE);
|
|
if (error)
|
|
return (error);
|
|
|
|
sx_xlock(&allprison_lock);
|
|
pr = prison_find_child(td->td_ucred->cr_prison, uap->jid);
|
|
if (pr == NULL) {
|
|
sx_xunlock(&allprison_lock);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/* Remove all descendants of this prison, then remove this prison. */
|
|
pr->pr_ref++;
|
|
pr->pr_flags |= PR_REMOVE;
|
|
if (!LIST_EMPTY(&pr->pr_children)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
lpr = NULL;
|
|
FOREACH_PRISON_DESCENDANT(pr, cpr, descend) {
|
|
mtx_lock(&cpr->pr_mtx);
|
|
if (cpr->pr_ref > 0) {
|
|
tpr = cpr;
|
|
cpr->pr_ref++;
|
|
cpr->pr_flags |= PR_REMOVE;
|
|
} else {
|
|
/* Already removed - do not do it again. */
|
|
tpr = NULL;
|
|
}
|
|
mtx_unlock(&cpr->pr_mtx);
|
|
if (lpr != NULL) {
|
|
mtx_lock(&lpr->pr_mtx);
|
|
prison_remove_one(lpr);
|
|
sx_xlock(&allprison_lock);
|
|
}
|
|
lpr = tpr;
|
|
}
|
|
if (lpr != NULL) {
|
|
mtx_lock(&lpr->pr_mtx);
|
|
prison_remove_one(lpr);
|
|
sx_xlock(&allprison_lock);
|
|
}
|
|
mtx_lock(&pr->pr_mtx);
|
|
}
|
|
prison_remove_one(pr);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
prison_remove_one(struct prison *pr)
|
|
{
|
|
struct proc *p;
|
|
int deuref;
|
|
|
|
/* If the prison was persistent, it is not anymore. */
|
|
deuref = 0;
|
|
if (pr->pr_flags & PR_PERSIST) {
|
|
pr->pr_ref--;
|
|
deuref = PD_DEUREF;
|
|
pr->pr_flags &= ~PR_PERSIST;
|
|
}
|
|
|
|
/*
|
|
* jail_remove added a reference. If that's the only one, remove
|
|
* the prison now.
|
|
*/
|
|
KASSERT(pr->pr_ref > 0,
|
|
("prison_remove_one removing a dead prison (jid=%d)", pr->pr_id));
|
|
if (pr->pr_ref == 1) {
|
|
prison_deref(pr,
|
|
deuref | PD_DEREF | PD_LOCKED | PD_LIST_XLOCKED);
|
|
return;
|
|
}
|
|
|
|
mtx_unlock(&pr->pr_mtx);
|
|
sx_xunlock(&allprison_lock);
|
|
/*
|
|
* Kill all processes unfortunate enough to be attached to this prison.
|
|
*/
|
|
sx_slock(&allproc_lock);
|
|
LIST_FOREACH(p, &allproc, p_list) {
|
|
PROC_LOCK(p);
|
|
if (p->p_state != PRS_NEW && p->p_ucred &&
|
|
p->p_ucred->cr_prison == pr)
|
|
kern_psignal(p, SIGKILL);
|
|
PROC_UNLOCK(p);
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
/* Remove the temporary reference added by jail_remove. */
|
|
prison_deref(pr, deuref | PD_DEREF);
|
|
}
|
|
|
|
|
|
/*
|
|
* struct jail_attach_args {
|
|
* int jid;
|
|
* };
|
|
*/
|
|
int
|
|
sys_jail_attach(struct thread *td, struct jail_attach_args *uap)
|
|
{
|
|
struct prison *pr;
|
|
int error;
|
|
|
|
error = priv_check(td, PRIV_JAIL_ATTACH);
|
|
if (error)
|
|
return (error);
|
|
|
|
sx_slock(&allprison_lock);
|
|
pr = prison_find_child(td->td_ucred->cr_prison, uap->jid);
|
|
if (pr == NULL) {
|
|
sx_sunlock(&allprison_lock);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/*
|
|
* Do not allow a process to attach to a prison that is not
|
|
* considered to be "alive".
|
|
*/
|
|
if (pr->pr_uref == 0) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
sx_sunlock(&allprison_lock);
|
|
return (EINVAL);
|
|
}
|
|
|
|
return (do_jail_attach(td, pr));
|
|
}
|
|
|
|
static int
|
|
do_jail_attach(struct thread *td, struct prison *pr)
|
|
{
|
|
struct prison *ppr;
|
|
struct proc *p;
|
|
struct ucred *newcred, *oldcred;
|
|
int vfslocked, error;
|
|
|
|
/*
|
|
* XXX: Note that there is a slight race here if two threads
|
|
* in the same privileged process attempt to attach to two
|
|
* different jails at the same time. It is important for
|
|
* user processes not to do this, or they might end up with
|
|
* a process root from one prison, but attached to the jail
|
|
* of another.
|
|
*/
|
|
pr->pr_ref++;
|
|
pr->pr_uref++;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
|
|
/* Let modules do whatever they need to prepare for attaching. */
|
|
error = osd_jail_call(pr, PR_METHOD_ATTACH, td);
|
|
if (error) {
|
|
prison_deref(pr, PD_DEREF | PD_DEUREF | PD_LIST_SLOCKED);
|
|
return (error);
|
|
}
|
|
sx_sunlock(&allprison_lock);
|
|
|
|
/*
|
|
* Reparent the newly attached process to this jail.
|
|
*/
|
|
ppr = td->td_ucred->cr_prison;
|
|
p = td->td_proc;
|
|
error = cpuset_setproc_update_set(p, pr->pr_cpuset);
|
|
if (error)
|
|
goto e_revert_osd;
|
|
|
|
vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount);
|
|
vn_lock(pr->pr_root, LK_EXCLUSIVE | LK_RETRY);
|
|
if ((error = change_dir(pr->pr_root, td)) != 0)
|
|
goto e_unlock;
|
|
#ifdef MAC
|
|
if ((error = mac_vnode_check_chroot(td->td_ucred, pr->pr_root)))
|
|
goto e_unlock;
|
|
#endif
|
|
VOP_UNLOCK(pr->pr_root, 0);
|
|
if ((error = change_root(pr->pr_root, td)))
|
|
goto e_unlock_giant;
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
|
|
newcred = crget();
|
|
PROC_LOCK(p);
|
|
oldcred = p->p_ucred;
|
|
setsugid(p);
|
|
crcopy(newcred, oldcred);
|
|
newcred->cr_prison = pr;
|
|
p->p_ucred = newcred;
|
|
PROC_UNLOCK(p);
|
|
#ifdef RACCT
|
|
racct_proc_ucred_changed(p, oldcred, newcred);
|
|
#endif
|
|
crfree(oldcred);
|
|
prison_deref(ppr, PD_DEREF | PD_DEUREF);
|
|
return (0);
|
|
e_unlock:
|
|
VOP_UNLOCK(pr->pr_root, 0);
|
|
e_unlock_giant:
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
e_revert_osd:
|
|
/* Tell modules this thread is still in its old jail after all. */
|
|
(void)osd_jail_call(ppr, PR_METHOD_ATTACH, td);
|
|
prison_deref(pr, PD_DEREF | PD_DEUREF);
|
|
return (error);
|
|
}
|
|
|
|
|
|
/*
|
|
* Returns a locked prison instance, or NULL on failure.
|
|
*/
|
|
struct prison *
|
|
prison_find(int prid)
|
|
{
|
|
struct prison *pr;
|
|
|
|
sx_assert(&allprison_lock, SX_LOCKED);
|
|
TAILQ_FOREACH(pr, &allprison, pr_list) {
|
|
if (pr->pr_id == prid) {
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (pr->pr_ref > 0)
|
|
return (pr);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Find a prison that is a descendant of mypr. Returns a locked prison or NULL.
|
|
*/
|
|
struct prison *
|
|
prison_find_child(struct prison *mypr, int prid)
|
|
{
|
|
struct prison *pr;
|
|
int descend;
|
|
|
|
sx_assert(&allprison_lock, SX_LOCKED);
|
|
FOREACH_PRISON_DESCENDANT(mypr, pr, descend) {
|
|
if (pr->pr_id == prid) {
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (pr->pr_ref > 0)
|
|
return (pr);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Look for the name relative to mypr. Returns a locked prison or NULL.
|
|
*/
|
|
struct prison *
|
|
prison_find_name(struct prison *mypr, const char *name)
|
|
{
|
|
struct prison *pr, *deadpr;
|
|
size_t mylen;
|
|
int descend;
|
|
|
|
sx_assert(&allprison_lock, SX_LOCKED);
|
|
mylen = (mypr == &prison0) ? 0 : strlen(mypr->pr_name) + 1;
|
|
again:
|
|
deadpr = NULL;
|
|
FOREACH_PRISON_DESCENDANT(mypr, pr, descend) {
|
|
if (!strcmp(pr->pr_name + mylen, name)) {
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (pr->pr_ref > 0) {
|
|
if (pr->pr_uref > 0)
|
|
return (pr);
|
|
deadpr = pr;
|
|
}
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
}
|
|
/* There was no valid prison - perhaps there was a dying one. */
|
|
if (deadpr != NULL) {
|
|
mtx_lock(&deadpr->pr_mtx);
|
|
if (deadpr->pr_ref == 0) {
|
|
mtx_unlock(&deadpr->pr_mtx);
|
|
goto again;
|
|
}
|
|
}
|
|
return (deadpr);
|
|
}
|
|
|
|
/*
|
|
* See if a prison has the specific flag set.
|
|
*/
|
|
int
|
|
prison_flag(struct ucred *cred, unsigned flag)
|
|
{
|
|
|
|
/* This is an atomic read, so no locking is necessary. */
|
|
return (cred->cr_prison->pr_flags & flag);
|
|
}
|
|
|
|
int
|
|
prison_allow(struct ucred *cred, unsigned flag)
|
|
{
|
|
|
|
/* This is an atomic read, so no locking is necessary. */
|
|
return (cred->cr_prison->pr_allow & flag);
|
|
}
|
|
|
|
/*
|
|
* Remove a prison reference. If that was the last reference, remove the
|
|
* prison itself - but not in this context in case there are locks held.
|
|
*/
|
|
void
|
|
prison_free_locked(struct prison *pr)
|
|
{
|
|
|
|
mtx_assert(&pr->pr_mtx, MA_OWNED);
|
|
pr->pr_ref--;
|
|
if (pr->pr_ref == 0) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
TASK_INIT(&pr->pr_task, 0, prison_complete, pr);
|
|
taskqueue_enqueue(taskqueue_thread, &pr->pr_task);
|
|
return;
|
|
}
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
|
|
void
|
|
prison_free(struct prison *pr)
|
|
{
|
|
|
|
mtx_lock(&pr->pr_mtx);
|
|
prison_free_locked(pr);
|
|
}
|
|
|
|
static void
|
|
prison_complete(void *context, int pending)
|
|
{
|
|
|
|
prison_deref((struct prison *)context, 0);
|
|
}
|
|
|
|
/*
|
|
* Remove a prison reference (usually). This internal version assumes no
|
|
* mutexes are held, except perhaps the prison itself. If there are no more
|
|
* references, release and delist the prison. On completion, the prison lock
|
|
* and the allprison lock are both unlocked.
|
|
*/
|
|
static void
|
|
prison_deref(struct prison *pr, int flags)
|
|
{
|
|
struct prison *ppr, *tpr;
|
|
int vfslocked;
|
|
|
|
if (!(flags & PD_LOCKED))
|
|
mtx_lock(&pr->pr_mtx);
|
|
for (;;) {
|
|
if (flags & PD_DEUREF) {
|
|
pr->pr_uref--;
|
|
KASSERT(prison0.pr_uref != 0, ("prison0 pr_uref=0"));
|
|
}
|
|
if (flags & PD_DEREF)
|
|
pr->pr_ref--;
|
|
/* If the prison still has references, nothing else to do. */
|
|
if (pr->pr_ref > 0) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
if (flags & PD_LIST_SLOCKED)
|
|
sx_sunlock(&allprison_lock);
|
|
else if (flags & PD_LIST_XLOCKED)
|
|
sx_xunlock(&allprison_lock);
|
|
return;
|
|
}
|
|
|
|
mtx_unlock(&pr->pr_mtx);
|
|
if (flags & PD_LIST_SLOCKED) {
|
|
if (!sx_try_upgrade(&allprison_lock)) {
|
|
sx_sunlock(&allprison_lock);
|
|
sx_xlock(&allprison_lock);
|
|
}
|
|
} else if (!(flags & PD_LIST_XLOCKED))
|
|
sx_xlock(&allprison_lock);
|
|
|
|
TAILQ_REMOVE(&allprison, pr, pr_list);
|
|
LIST_REMOVE(pr, pr_sibling);
|
|
ppr = pr->pr_parent;
|
|
for (tpr = ppr; tpr != NULL; tpr = tpr->pr_parent)
|
|
tpr->pr_childcount--;
|
|
sx_xunlock(&allprison_lock);
|
|
|
|
#ifdef VIMAGE
|
|
if (pr->pr_vnet != ppr->pr_vnet)
|
|
vnet_destroy(pr->pr_vnet);
|
|
#endif
|
|
if (pr->pr_root != NULL) {
|
|
vfslocked = VFS_LOCK_GIANT(pr->pr_root->v_mount);
|
|
vrele(pr->pr_root);
|
|
VFS_UNLOCK_GIANT(vfslocked);
|
|
}
|
|
mtx_destroy(&pr->pr_mtx);
|
|
#ifdef INET
|
|
free(pr->pr_ip4, M_PRISON);
|
|
#endif
|
|
#ifdef INET6
|
|
free(pr->pr_ip6, M_PRISON);
|
|
#endif
|
|
if (pr->pr_cpuset != NULL)
|
|
cpuset_rel(pr->pr_cpuset);
|
|
osd_jail_exit(pr);
|
|
#ifdef RACCT
|
|
prison_racct_detach(pr);
|
|
#endif
|
|
free(pr, M_PRISON);
|
|
|
|
/* Removing a prison frees a reference on its parent. */
|
|
pr = ppr;
|
|
mtx_lock(&pr->pr_mtx);
|
|
flags = PD_DEREF | PD_DEUREF;
|
|
}
|
|
}
|
|
|
|
void
|
|
prison_hold_locked(struct prison *pr)
|
|
{
|
|
|
|
mtx_assert(&pr->pr_mtx, MA_OWNED);
|
|
KASSERT(pr->pr_ref > 0,
|
|
("Trying to hold dead prison (jid=%d).", pr->pr_id));
|
|
pr->pr_ref++;
|
|
}
|
|
|
|
void
|
|
prison_hold(struct prison *pr)
|
|
{
|
|
|
|
mtx_lock(&pr->pr_mtx);
|
|
prison_hold_locked(pr);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
|
|
void
|
|
prison_proc_hold(struct prison *pr)
|
|
{
|
|
|
|
mtx_lock(&pr->pr_mtx);
|
|
KASSERT(pr->pr_uref > 0,
|
|
("Cannot add a process to a non-alive prison (jid=%d)", pr->pr_id));
|
|
pr->pr_uref++;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
|
|
void
|
|
prison_proc_free(struct prison *pr)
|
|
{
|
|
|
|
mtx_lock(&pr->pr_mtx);
|
|
KASSERT(pr->pr_uref > 0,
|
|
("Trying to kill a process in a dead prison (jid=%d)", pr->pr_id));
|
|
prison_deref(pr, PD_DEUREF | PD_LOCKED);
|
|
}
|
|
|
|
|
|
#ifdef INET
|
|
/*
|
|
* Restrict a prison's IP address list with its parent's, possibly replacing
|
|
* it. Return true if the replacement buffer was used (or would have been).
|
|
*/
|
|
static int
|
|
prison_restrict_ip4(struct prison *pr, struct in_addr *newip4)
|
|
{
|
|
int ii, ij, used;
|
|
struct prison *ppr;
|
|
|
|
ppr = pr->pr_parent;
|
|
if (!(pr->pr_flags & PR_IP4_USER)) {
|
|
/* This has no user settings, so just copy the parent's list. */
|
|
if (pr->pr_ip4s < ppr->pr_ip4s) {
|
|
/*
|
|
* There's no room for the parent's list. Use the
|
|
* new list buffer, which is assumed to be big enough
|
|
* (if it was passed). If there's no buffer, try to
|
|
* allocate one.
|
|
*/
|
|
used = 1;
|
|
if (newip4 == NULL) {
|
|
newip4 = malloc(ppr->pr_ip4s * sizeof(*newip4),
|
|
M_PRISON, M_NOWAIT);
|
|
if (newip4 != NULL)
|
|
used = 0;
|
|
}
|
|
if (newip4 != NULL) {
|
|
bcopy(ppr->pr_ip4, newip4,
|
|
ppr->pr_ip4s * sizeof(*newip4));
|
|
free(pr->pr_ip4, M_PRISON);
|
|
pr->pr_ip4 = newip4;
|
|
pr->pr_ip4s = ppr->pr_ip4s;
|
|
}
|
|
return (used);
|
|
}
|
|
pr->pr_ip4s = ppr->pr_ip4s;
|
|
if (pr->pr_ip4s > 0)
|
|
bcopy(ppr->pr_ip4, pr->pr_ip4,
|
|
pr->pr_ip4s * sizeof(*newip4));
|
|
else if (pr->pr_ip4 != NULL) {
|
|
free(pr->pr_ip4, M_PRISON);
|
|
pr->pr_ip4 = NULL;
|
|
}
|
|
} else if (pr->pr_ip4s > 0) {
|
|
/* Remove addresses that aren't in the parent. */
|
|
for (ij = 0; ij < ppr->pr_ip4s; ij++)
|
|
if (pr->pr_ip4[0].s_addr == ppr->pr_ip4[ij].s_addr)
|
|
break;
|
|
if (ij < ppr->pr_ip4s)
|
|
ii = 1;
|
|
else {
|
|
bcopy(pr->pr_ip4 + 1, pr->pr_ip4,
|
|
--pr->pr_ip4s * sizeof(*pr->pr_ip4));
|
|
ii = 0;
|
|
}
|
|
for (ij = 1; ii < pr->pr_ip4s; ) {
|
|
if (pr->pr_ip4[ii].s_addr == ppr->pr_ip4[0].s_addr) {
|
|
ii++;
|
|
continue;
|
|
}
|
|
switch (ij >= ppr->pr_ip4s ? -1 :
|
|
qcmp_v4(&pr->pr_ip4[ii], &ppr->pr_ip4[ij])) {
|
|
case -1:
|
|
bcopy(pr->pr_ip4 + ii + 1, pr->pr_ip4 + ii,
|
|
(--pr->pr_ip4s - ii) * sizeof(*pr->pr_ip4));
|
|
break;
|
|
case 0:
|
|
ii++;
|
|
ij++;
|
|
break;
|
|
case 1:
|
|
ij++;
|
|
break;
|
|
}
|
|
}
|
|
if (pr->pr_ip4s == 0) {
|
|
pr->pr_flags |= PR_IP4_DISABLE;
|
|
free(pr->pr_ip4, M_PRISON);
|
|
pr->pr_ip4 = NULL;
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Pass back primary IPv4 address of this jail.
|
|
*
|
|
* If not restricted return success but do not alter the address. Caller has
|
|
* to make sure to initialize it correctly (e.g. INADDR_ANY).
|
|
*
|
|
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4.
|
|
* Address returned in NBO.
|
|
*/
|
|
int
|
|
prison_get_ip4(struct ucred *cred, struct in_addr *ia)
|
|
{
|
|
struct prison *pr;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
if (!(pr->pr_flags & PR_IP4))
|
|
return (0);
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (!(pr->pr_flags & PR_IP4)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
if (pr->pr_ip4 == NULL) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
ia->s_addr = pr->pr_ip4[0].s_addr;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return 1 if we should do proper source address selection or are not jailed.
|
|
* We will return 0 if we should bypass source address selection in favour
|
|
* of the primary jail IPv4 address. Only in this case *ia will be updated and
|
|
* returned in NBO.
|
|
* Return EAFNOSUPPORT, in case this jail does not allow IPv4.
|
|
*/
|
|
int
|
|
prison_saddrsel_ip4(struct ucred *cred, struct in_addr *ia)
|
|
{
|
|
struct prison *pr;
|
|
struct in_addr lia;
|
|
int error;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
|
|
|
if (!jailed(cred))
|
|
return (1);
|
|
|
|
pr = cred->cr_prison;
|
|
if (pr->pr_flags & PR_IP4_SADDRSEL)
|
|
return (1);
|
|
|
|
lia.s_addr = INADDR_ANY;
|
|
error = prison_get_ip4(cred, &lia);
|
|
if (error)
|
|
return (error);
|
|
if (lia.s_addr == INADDR_ANY)
|
|
return (1);
|
|
|
|
ia->s_addr = lia.s_addr;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return true if pr1 and pr2 have the same IPv4 address restrictions.
|
|
*/
|
|
int
|
|
prison_equal_ip4(struct prison *pr1, struct prison *pr2)
|
|
{
|
|
|
|
if (pr1 == pr2)
|
|
return (1);
|
|
|
|
/*
|
|
* No need to lock since the PR_IP4_USER flag can't be altered for
|
|
* existing prisons.
|
|
*/
|
|
while (pr1 != &prison0 &&
|
|
#ifdef VIMAGE
|
|
!(pr1->pr_flags & PR_VNET) &&
|
|
#endif
|
|
!(pr1->pr_flags & PR_IP4_USER))
|
|
pr1 = pr1->pr_parent;
|
|
while (pr2 != &prison0 &&
|
|
#ifdef VIMAGE
|
|
!(pr2->pr_flags & PR_VNET) &&
|
|
#endif
|
|
!(pr2->pr_flags & PR_IP4_USER))
|
|
pr2 = pr2->pr_parent;
|
|
return (pr1 == pr2);
|
|
}
|
|
|
|
/*
|
|
* Make sure our (source) address is set to something meaningful to this
|
|
* jail.
|
|
*
|
|
* Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail,
|
|
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
|
* doesn't allow IPv4. Address passed in in NBO and returned in NBO.
|
|
*/
|
|
int
|
|
prison_local_ip4(struct ucred *cred, struct in_addr *ia)
|
|
{
|
|
struct prison *pr;
|
|
struct in_addr ia0;
|
|
int error;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
if (!(pr->pr_flags & PR_IP4))
|
|
return (0);
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (!(pr->pr_flags & PR_IP4)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
if (pr->pr_ip4 == NULL) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
ia0.s_addr = ntohl(ia->s_addr);
|
|
if (ia0.s_addr == INADDR_LOOPBACK) {
|
|
ia->s_addr = pr->pr_ip4[0].s_addr;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
if (ia0.s_addr == INADDR_ANY) {
|
|
/*
|
|
* In case there is only 1 IPv4 address, bind directly.
|
|
*/
|
|
if (pr->pr_ip4s == 1)
|
|
ia->s_addr = pr->pr_ip4[0].s_addr;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
error = _prison_check_ip4(pr, ia);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Rewrite destination address in case we will connect to loopback address.
|
|
*
|
|
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv4.
|
|
* Address passed in in NBO and returned in NBO.
|
|
*/
|
|
int
|
|
prison_remote_ip4(struct ucred *cred, struct in_addr *ia)
|
|
{
|
|
struct prison *pr;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
if (!(pr->pr_flags & PR_IP4))
|
|
return (0);
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (!(pr->pr_flags & PR_IP4)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
if (pr->pr_ip4 == NULL) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
if (ntohl(ia->s_addr) == INADDR_LOOPBACK) {
|
|
ia->s_addr = pr->pr_ip4[0].s_addr;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return success because nothing had to be changed.
|
|
*/
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check if given address belongs to the jail referenced by cred/prison.
|
|
*
|
|
* Returns 0 if jail doesn't restrict IPv4 or if address belongs to jail,
|
|
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
|
* doesn't allow IPv4. Address passed in in NBO.
|
|
*/
|
|
static int
|
|
_prison_check_ip4(struct prison *pr, struct in_addr *ia)
|
|
{
|
|
int i, a, z, d;
|
|
|
|
/*
|
|
* Check the primary IP.
|
|
*/
|
|
if (pr->pr_ip4[0].s_addr == ia->s_addr)
|
|
return (0);
|
|
|
|
/*
|
|
* All the other IPs are sorted so we can do a binary search.
|
|
*/
|
|
a = 0;
|
|
z = pr->pr_ip4s - 2;
|
|
while (a <= z) {
|
|
i = (a + z) / 2;
|
|
d = qcmp_v4(&pr->pr_ip4[i+1], ia);
|
|
if (d > 0)
|
|
z = i - 1;
|
|
else if (d < 0)
|
|
a = i + 1;
|
|
else
|
|
return (0);
|
|
}
|
|
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
|
|
int
|
|
prison_check_ip4(struct ucred *cred, struct in_addr *ia)
|
|
{
|
|
struct prison *pr;
|
|
int error;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia != NULL, ("%s: ia is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
if (!(pr->pr_flags & PR_IP4))
|
|
return (0);
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (!(pr->pr_flags & PR_IP4)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
if (pr->pr_ip4 == NULL) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
error = _prison_check_ip4(pr, ia);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
static int
|
|
prison_restrict_ip6(struct prison *pr, struct in6_addr *newip6)
|
|
{
|
|
int ii, ij, used;
|
|
struct prison *ppr;
|
|
|
|
ppr = pr->pr_parent;
|
|
if (!(pr->pr_flags & PR_IP6_USER)) {
|
|
/* This has no user settings, so just copy the parent's list. */
|
|
if (pr->pr_ip6s < ppr->pr_ip6s) {
|
|
/*
|
|
* There's no room for the parent's list. Use the
|
|
* new list buffer, which is assumed to be big enough
|
|
* (if it was passed). If there's no buffer, try to
|
|
* allocate one.
|
|
*/
|
|
used = 1;
|
|
if (newip6 == NULL) {
|
|
newip6 = malloc(ppr->pr_ip6s * sizeof(*newip6),
|
|
M_PRISON, M_NOWAIT);
|
|
if (newip6 != NULL)
|
|
used = 0;
|
|
}
|
|
if (newip6 != NULL) {
|
|
bcopy(ppr->pr_ip6, newip6,
|
|
ppr->pr_ip6s * sizeof(*newip6));
|
|
free(pr->pr_ip6, M_PRISON);
|
|
pr->pr_ip6 = newip6;
|
|
pr->pr_ip6s = ppr->pr_ip6s;
|
|
}
|
|
return (used);
|
|
}
|
|
pr->pr_ip6s = ppr->pr_ip6s;
|
|
if (pr->pr_ip6s > 0)
|
|
bcopy(ppr->pr_ip6, pr->pr_ip6,
|
|
pr->pr_ip6s * sizeof(*newip6));
|
|
else if (pr->pr_ip6 != NULL) {
|
|
free(pr->pr_ip6, M_PRISON);
|
|
pr->pr_ip6 = NULL;
|
|
}
|
|
} else if (pr->pr_ip6s > 0) {
|
|
/* Remove addresses that aren't in the parent. */
|
|
for (ij = 0; ij < ppr->pr_ip6s; ij++)
|
|
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0],
|
|
&ppr->pr_ip6[ij]))
|
|
break;
|
|
if (ij < ppr->pr_ip6s)
|
|
ii = 1;
|
|
else {
|
|
bcopy(pr->pr_ip6 + 1, pr->pr_ip6,
|
|
--pr->pr_ip6s * sizeof(*pr->pr_ip6));
|
|
ii = 0;
|
|
}
|
|
for (ij = 1; ii < pr->pr_ip6s; ) {
|
|
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[ii],
|
|
&ppr->pr_ip6[0])) {
|
|
ii++;
|
|
continue;
|
|
}
|
|
switch (ij >= ppr->pr_ip4s ? -1 :
|
|
qcmp_v6(&pr->pr_ip6[ii], &ppr->pr_ip6[ij])) {
|
|
case -1:
|
|
bcopy(pr->pr_ip6 + ii + 1, pr->pr_ip6 + ii,
|
|
(--pr->pr_ip6s - ii) * sizeof(*pr->pr_ip6));
|
|
break;
|
|
case 0:
|
|
ii++;
|
|
ij++;
|
|
break;
|
|
case 1:
|
|
ij++;
|
|
break;
|
|
}
|
|
}
|
|
if (pr->pr_ip6s == 0) {
|
|
pr->pr_flags |= PR_IP6_DISABLE;
|
|
free(pr->pr_ip6, M_PRISON);
|
|
pr->pr_ip6 = NULL;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Pass back primary IPv6 address for this jail.
|
|
*
|
|
* If not restricted return success but do not alter the address. Caller has
|
|
* to make sure to initialize it correctly (e.g. IN6ADDR_ANY_INIT).
|
|
*
|
|
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6.
|
|
*/
|
|
int
|
|
prison_get_ip6(struct ucred *cred, struct in6_addr *ia6)
|
|
{
|
|
struct prison *pr;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
if (!(pr->pr_flags & PR_IP6))
|
|
return (0);
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (!(pr->pr_flags & PR_IP6)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
if (pr->pr_ip6 == NULL) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return 1 if we should do proper source address selection or are not jailed.
|
|
* We will return 0 if we should bypass source address selection in favour
|
|
* of the primary jail IPv6 address. Only in this case *ia will be updated and
|
|
* returned in NBO.
|
|
* Return EAFNOSUPPORT, in case this jail does not allow IPv6.
|
|
*/
|
|
int
|
|
prison_saddrsel_ip6(struct ucred *cred, struct in6_addr *ia6)
|
|
{
|
|
struct prison *pr;
|
|
struct in6_addr lia6;
|
|
int error;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
|
|
if (!jailed(cred))
|
|
return (1);
|
|
|
|
pr = cred->cr_prison;
|
|
if (pr->pr_flags & PR_IP6_SADDRSEL)
|
|
return (1);
|
|
|
|
lia6 = in6addr_any;
|
|
error = prison_get_ip6(cred, &lia6);
|
|
if (error)
|
|
return (error);
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&lia6))
|
|
return (1);
|
|
|
|
bcopy(&lia6, ia6, sizeof(struct in6_addr));
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return true if pr1 and pr2 have the same IPv6 address restrictions.
|
|
*/
|
|
int
|
|
prison_equal_ip6(struct prison *pr1, struct prison *pr2)
|
|
{
|
|
|
|
if (pr1 == pr2)
|
|
return (1);
|
|
|
|
while (pr1 != &prison0 &&
|
|
#ifdef VIMAGE
|
|
!(pr1->pr_flags & PR_VNET) &&
|
|
#endif
|
|
!(pr1->pr_flags & PR_IP6_USER))
|
|
pr1 = pr1->pr_parent;
|
|
while (pr2 != &prison0 &&
|
|
#ifdef VIMAGE
|
|
!(pr2->pr_flags & PR_VNET) &&
|
|
#endif
|
|
!(pr2->pr_flags & PR_IP6_USER))
|
|
pr2 = pr2->pr_parent;
|
|
return (pr1 == pr2);
|
|
}
|
|
|
|
/*
|
|
* Make sure our (source) address is set to something meaningful to this jail.
|
|
*
|
|
* v6only should be set based on (inp->inp_flags & IN6P_IPV6_V6ONLY != 0)
|
|
* when needed while binding.
|
|
*
|
|
* Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail,
|
|
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
|
* doesn't allow IPv6.
|
|
*/
|
|
int
|
|
prison_local_ip6(struct ucred *cred, struct in6_addr *ia6, int v6only)
|
|
{
|
|
struct prison *pr;
|
|
int error;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
if (!(pr->pr_flags & PR_IP6))
|
|
return (0);
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (!(pr->pr_flags & PR_IP6)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
if (pr->pr_ip6 == NULL) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
if (IN6_IS_ADDR_LOOPBACK(ia6)) {
|
|
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
if (IN6_IS_ADDR_UNSPECIFIED(ia6)) {
|
|
/*
|
|
* In case there is only 1 IPv6 address, and v6only is true,
|
|
* then bind directly.
|
|
*/
|
|
if (v6only != 0 && pr->pr_ip6s == 1)
|
|
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
error = _prison_check_ip6(pr, ia6);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Rewrite destination address in case we will connect to loopback address.
|
|
*
|
|
* Returns 0 on success, EAFNOSUPPORT if the jail doesn't allow IPv6.
|
|
*/
|
|
int
|
|
prison_remote_ip6(struct ucred *cred, struct in6_addr *ia6)
|
|
{
|
|
struct prison *pr;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
if (!(pr->pr_flags & PR_IP6))
|
|
return (0);
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (!(pr->pr_flags & PR_IP6)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
if (pr->pr_ip6 == NULL) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
if (IN6_IS_ADDR_LOOPBACK(ia6)) {
|
|
bcopy(&pr->pr_ip6[0], ia6, sizeof(struct in6_addr));
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return success because nothing had to be changed.
|
|
*/
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Check if given address belongs to the jail referenced by cred/prison.
|
|
*
|
|
* Returns 0 if jail doesn't restrict IPv6 or if address belongs to jail,
|
|
* EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if the jail
|
|
* doesn't allow IPv6.
|
|
*/
|
|
static int
|
|
_prison_check_ip6(struct prison *pr, struct in6_addr *ia6)
|
|
{
|
|
int i, a, z, d;
|
|
|
|
/*
|
|
* Check the primary IP.
|
|
*/
|
|
if (IN6_ARE_ADDR_EQUAL(&pr->pr_ip6[0], ia6))
|
|
return (0);
|
|
|
|
/*
|
|
* All the other IPs are sorted so we can do a binary search.
|
|
*/
|
|
a = 0;
|
|
z = pr->pr_ip6s - 2;
|
|
while (a <= z) {
|
|
i = (a + z) / 2;
|
|
d = qcmp_v6(&pr->pr_ip6[i+1], ia6);
|
|
if (d > 0)
|
|
z = i - 1;
|
|
else if (d < 0)
|
|
a = i + 1;
|
|
else
|
|
return (0);
|
|
}
|
|
|
|
return (EADDRNOTAVAIL);
|
|
}
|
|
|
|
int
|
|
prison_check_ip6(struct ucred *cred, struct in6_addr *ia6)
|
|
{
|
|
struct prison *pr;
|
|
int error;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(ia6 != NULL, ("%s: ia6 is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
if (!(pr->pr_flags & PR_IP6))
|
|
return (0);
|
|
mtx_lock(&pr->pr_mtx);
|
|
if (!(pr->pr_flags & PR_IP6)) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (0);
|
|
}
|
|
if (pr->pr_ip6 == NULL) {
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (EAFNOSUPPORT);
|
|
}
|
|
|
|
error = _prison_check_ip6(pr, ia6);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
return (error);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Check if a jail supports the given address family.
|
|
*
|
|
* Returns 0 if not jailed or the address family is supported, EAFNOSUPPORT
|
|
* if not.
|
|
*/
|
|
int
|
|
prison_check_af(struct ucred *cred, int af)
|
|
{
|
|
struct prison *pr;
|
|
int error;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
|
|
pr = cred->cr_prison;
|
|
#ifdef VIMAGE
|
|
/* Prisons with their own network stack are not limited. */
|
|
if (prison_owns_vnet(cred))
|
|
return (0);
|
|
#endif
|
|
|
|
error = 0;
|
|
switch (af)
|
|
{
|
|
#ifdef INET
|
|
case AF_INET:
|
|
if (pr->pr_flags & PR_IP4)
|
|
{
|
|
mtx_lock(&pr->pr_mtx);
|
|
if ((pr->pr_flags & PR_IP4) && pr->pr_ip4 == NULL)
|
|
error = EAFNOSUPPORT;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
if (pr->pr_flags & PR_IP6)
|
|
{
|
|
mtx_lock(&pr->pr_mtx);
|
|
if ((pr->pr_flags & PR_IP6) && pr->pr_ip6 == NULL)
|
|
error = EAFNOSUPPORT;
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
break;
|
|
#endif
|
|
case AF_LOCAL:
|
|
case AF_ROUTE:
|
|
break;
|
|
default:
|
|
if (!(pr->pr_allow & PR_ALLOW_SOCKET_AF))
|
|
error = EAFNOSUPPORT;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Check if given address belongs to the jail referenced by cred (wrapper to
|
|
* prison_check_ip[46]).
|
|
*
|
|
* Returns 0 if jail doesn't restrict the address family or if address belongs
|
|
* to jail, EADDRNOTAVAIL if the address doesn't belong, or EAFNOSUPPORT if
|
|
* the jail doesn't allow the address family. IPv4 Address passed in in NBO.
|
|
*/
|
|
int
|
|
prison_if(struct ucred *cred, struct sockaddr *sa)
|
|
{
|
|
#ifdef INET
|
|
struct sockaddr_in *sai;
|
|
#endif
|
|
#ifdef INET6
|
|
struct sockaddr_in6 *sai6;
|
|
#endif
|
|
int error;
|
|
|
|
KASSERT(cred != NULL, ("%s: cred is NULL", __func__));
|
|
KASSERT(sa != NULL, ("%s: sa is NULL", __func__));
|
|
|
|
#ifdef VIMAGE
|
|
if (prison_owns_vnet(cred))
|
|
return (0);
|
|
#endif
|
|
|
|
error = 0;
|
|
switch (sa->sa_family)
|
|
{
|
|
#ifdef INET
|
|
case AF_INET:
|
|
sai = (struct sockaddr_in *)sa;
|
|
error = prison_check_ip4(cred, &sai->sin_addr);
|
|
break;
|
|
#endif
|
|
#ifdef INET6
|
|
case AF_INET6:
|
|
sai6 = (struct sockaddr_in6 *)sa;
|
|
error = prison_check_ip6(cred, &sai6->sin6_addr);
|
|
break;
|
|
#endif
|
|
default:
|
|
if (!(cred->cr_prison->pr_allow & PR_ALLOW_SOCKET_AF))
|
|
error = EAFNOSUPPORT;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return 0 if jails permit p1 to frob p2, otherwise ESRCH.
|
|
*/
|
|
int
|
|
prison_check(struct ucred *cred1, struct ucred *cred2)
|
|
{
|
|
|
|
return ((cred1->cr_prison == cred2->cr_prison ||
|
|
prison_ischild(cred1->cr_prison, cred2->cr_prison)) ? 0 : ESRCH);
|
|
}
|
|
|
|
/*
|
|
* Return 1 if p2 is a child of p1, otherwise 0.
|
|
*/
|
|
int
|
|
prison_ischild(struct prison *pr1, struct prison *pr2)
|
|
{
|
|
|
|
for (pr2 = pr2->pr_parent; pr2 != NULL; pr2 = pr2->pr_parent)
|
|
if (pr1 == pr2)
|
|
return (1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Return 1 if the passed credential is in a jail, otherwise 0.
|
|
*/
|
|
int
|
|
jailed(struct ucred *cred)
|
|
{
|
|
|
|
return (cred->cr_prison != &prison0);
|
|
}
|
|
|
|
/*
|
|
* Return 1 if the passed credential is in a jail and that jail does not
|
|
* have its own virtual network stack, otherwise 0.
|
|
*/
|
|
int
|
|
jailed_without_vnet(struct ucred *cred)
|
|
{
|
|
|
|
if (!jailed(cred))
|
|
return (0);
|
|
#ifdef VIMAGE
|
|
if (prison_owns_vnet(cred))
|
|
return (0);
|
|
#endif
|
|
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Return the correct hostname (domainname, et al) for the passed credential.
|
|
*/
|
|
void
|
|
getcredhostname(struct ucred *cred, char *buf, size_t size)
|
|
{
|
|
struct prison *pr;
|
|
|
|
/*
|
|
* A NULL credential can be used to shortcut to the physical
|
|
* system's hostname.
|
|
*/
|
|
pr = (cred != NULL) ? cred->cr_prison : &prison0;
|
|
mtx_lock(&pr->pr_mtx);
|
|
strlcpy(buf, pr->pr_hostname, size);
|
|
mtx_unlock(&pr->pr_mtx);
|
|
}
|
|
|
|
void
|
|
getcreddomainname(struct ucred *cred, char *buf, size_t size)
|
|
{
|
|
|
|
mtx_lock(&cred->cr_prison->pr_mtx);
|
|
strlcpy(buf, cred->cr_prison->pr_domainname, size);
|
|
mtx_unlock(&cred->cr_prison->pr_mtx);
|
|
}
|
|
|
|
void
|
|
getcredhostuuid(struct ucred *cred, char *buf, size_t size)
|
|
{
|
|
|
|
mtx_lock(&cred->cr_prison->pr_mtx);
|
|
strlcpy(buf, cred->cr_prison->pr_hostuuid, size);
|
|
mtx_unlock(&cred->cr_prison->pr_mtx);
|
|
}
|
|
|
|
void
|
|
getcredhostid(struct ucred *cred, unsigned long *hostid)
|
|
{
|
|
|
|
mtx_lock(&cred->cr_prison->pr_mtx);
|
|
*hostid = cred->cr_prison->pr_hostid;
|
|
mtx_unlock(&cred->cr_prison->pr_mtx);
|
|
}
|
|
|
|
#ifdef VIMAGE
|
|
/*
|
|
* Determine whether the prison represented by cred owns
|
|
* its vnet rather than having it inherited.
|
|
*
|
|
* Returns 1 in case the prison owns the vnet, 0 otherwise.
|
|
*/
|
|
int
|
|
prison_owns_vnet(struct ucred *cred)
|
|
{
|
|
|
|
/*
|
|
* vnets cannot be added/removed after jail creation,
|
|
* so no need to lock here.
|
|
*/
|
|
return (cred->cr_prison->pr_flags & PR_VNET ? 1 : 0);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Determine whether the subject represented by cred can "see"
|
|
* status of a mount point.
|
|
* Returns: 0 for permitted, ENOENT otherwise.
|
|
* XXX: This function should be called cr_canseemount() and should be
|
|
* placed in kern_prot.c.
|
|
*/
|
|
int
|
|
prison_canseemount(struct ucred *cred, struct mount *mp)
|
|
{
|
|
struct prison *pr;
|
|
struct statfs *sp;
|
|
size_t len;
|
|
|
|
pr = cred->cr_prison;
|
|
if (pr->pr_enforce_statfs == 0)
|
|
return (0);
|
|
if (pr->pr_root->v_mount == mp)
|
|
return (0);
|
|
if (pr->pr_enforce_statfs == 2)
|
|
return (ENOENT);
|
|
/*
|
|
* If jail's chroot directory is set to "/" we should be able to see
|
|
* all mount-points from inside a jail.
|
|
* This is ugly check, but this is the only situation when jail's
|
|
* directory ends with '/'.
|
|
*/
|
|
if (strcmp(pr->pr_path, "/") == 0)
|
|
return (0);
|
|
len = strlen(pr->pr_path);
|
|
sp = &mp->mnt_stat;
|
|
if (strncmp(pr->pr_path, sp->f_mntonname, len) != 0)
|
|
return (ENOENT);
|
|
/*
|
|
* Be sure that we don't have situation where jail's root directory
|
|
* is "/some/path" and mount point is "/some/pathpath".
|
|
*/
|
|
if (sp->f_mntonname[len] != '\0' && sp->f_mntonname[len] != '/')
|
|
return (ENOENT);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
prison_enforce_statfs(struct ucred *cred, struct mount *mp, struct statfs *sp)
|
|
{
|
|
char jpath[MAXPATHLEN];
|
|
struct prison *pr;
|
|
size_t len;
|
|
|
|
pr = cred->cr_prison;
|
|
if (pr->pr_enforce_statfs == 0)
|
|
return;
|
|
if (prison_canseemount(cred, mp) != 0) {
|
|
bzero(sp->f_mntonname, sizeof(sp->f_mntonname));
|
|
strlcpy(sp->f_mntonname, "[restricted]",
|
|
sizeof(sp->f_mntonname));
|
|
return;
|
|
}
|
|
if (pr->pr_root->v_mount == mp) {
|
|
/*
|
|
* Clear current buffer data, so we are sure nothing from
|
|
* the valid path left there.
|
|
*/
|
|
bzero(sp->f_mntonname, sizeof(sp->f_mntonname));
|
|
*sp->f_mntonname = '/';
|
|
return;
|
|
}
|
|
/*
|
|
* If jail's chroot directory is set to "/" we should be able to see
|
|
* all mount-points from inside a jail.
|
|
*/
|
|
if (strcmp(pr->pr_path, "/") == 0)
|
|
return;
|
|
len = strlen(pr->pr_path);
|
|
strlcpy(jpath, sp->f_mntonname + len, sizeof(jpath));
|
|
/*
|
|
* Clear current buffer data, so we are sure nothing from
|
|
* the valid path left there.
|
|
*/
|
|
bzero(sp->f_mntonname, sizeof(sp->f_mntonname));
|
|
if (*jpath == '\0') {
|
|
/* Should never happen. */
|
|
*sp->f_mntonname = '/';
|
|
} else {
|
|
strlcpy(sp->f_mntonname, jpath, sizeof(sp->f_mntonname));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check with permission for a specific privilege is granted within jail. We
|
|
* have a specific list of accepted privileges; the rest are denied.
|
|
*/
|
|
int
|
|
prison_priv_check(struct ucred *cred, int priv)
|
|
{
|
|
|
|
if (!jailed(cred))
|
|
return (0);
|
|
|
|
#ifdef VIMAGE
|
|
/*
|
|
* Privileges specific to prisons with a virtual network stack.
|
|
* There might be a duplicate entry here in case the privilege
|
|
* is only granted conditionally in the legacy jail case.
|
|
*/
|
|
switch (priv) {
|
|
#ifdef notyet
|
|
/*
|
|
* NFS-specific privileges.
|
|
*/
|
|
case PRIV_NFS_DAEMON:
|
|
case PRIV_NFS_LOCKD:
|
|
#endif
|
|
/*
|
|
* Network stack privileges.
|
|
*/
|
|
case PRIV_NET_BRIDGE:
|
|
case PRIV_NET_GRE:
|
|
case PRIV_NET_BPF:
|
|
case PRIV_NET_RAW: /* Dup, cond. in legacy jail case. */
|
|
case PRIV_NET_ROUTE:
|
|
case PRIV_NET_TAP:
|
|
case PRIV_NET_SETIFMTU:
|
|
case PRIV_NET_SETIFFLAGS:
|
|
case PRIV_NET_SETIFCAP:
|
|
case PRIV_NET_SETIFDESCR:
|
|
case PRIV_NET_SETIFNAME :
|
|
case PRIV_NET_SETIFMETRIC:
|
|
case PRIV_NET_SETIFPHYS:
|
|
case PRIV_NET_SETIFMAC:
|
|
case PRIV_NET_ADDMULTI:
|
|
case PRIV_NET_DELMULTI:
|
|
case PRIV_NET_HWIOCTL:
|
|
case PRIV_NET_SETLLADDR:
|
|
case PRIV_NET_ADDIFGROUP:
|
|
case PRIV_NET_DELIFGROUP:
|
|
case PRIV_NET_IFCREATE:
|
|
case PRIV_NET_IFDESTROY:
|
|
case PRIV_NET_ADDIFADDR:
|
|
case PRIV_NET_DELIFADDR:
|
|
case PRIV_NET_LAGG:
|
|
case PRIV_NET_GIF:
|
|
case PRIV_NET_SETIFVNET:
|
|
case PRIV_NET_SETIFFIB:
|
|
|
|
/*
|
|
* 802.11-related privileges.
|
|
*/
|
|
case PRIV_NET80211_GETKEY:
|
|
#ifdef notyet
|
|
case PRIV_NET80211_MANAGE: /* XXX-BZ discuss with sam@ */
|
|
#endif
|
|
|
|
#ifdef notyet
|
|
/*
|
|
* AppleTalk privileges.
|
|
*/
|
|
case PRIV_NETATALK_RESERVEDPORT:
|
|
|
|
/*
|
|
* ATM privileges.
|
|
*/
|
|
case PRIV_NETATM_CFG:
|
|
case PRIV_NETATM_ADD:
|
|
case PRIV_NETATM_DEL:
|
|
case PRIV_NETATM_SET:
|
|
|
|
/*
|
|
* Bluetooth privileges.
|
|
*/
|
|
case PRIV_NETBLUETOOTH_RAW:
|
|
#endif
|
|
|
|
/*
|
|
* Netgraph and netgraph module privileges.
|
|
*/
|
|
case PRIV_NETGRAPH_CONTROL:
|
|
#ifdef notyet
|
|
case PRIV_NETGRAPH_TTY:
|
|
#endif
|
|
|
|
/*
|
|
* IPv4 and IPv6 privileges.
|
|
*/
|
|
case PRIV_NETINET_IPFW:
|
|
case PRIV_NETINET_DIVERT:
|
|
case PRIV_NETINET_PF:
|
|
case PRIV_NETINET_DUMMYNET:
|
|
case PRIV_NETINET_CARP:
|
|
case PRIV_NETINET_MROUTE:
|
|
case PRIV_NETINET_RAW:
|
|
case PRIV_NETINET_ADDRCTRL6:
|
|
case PRIV_NETINET_ND6:
|
|
case PRIV_NETINET_SCOPE6:
|
|
case PRIV_NETINET_ALIFETIME6:
|
|
case PRIV_NETINET_IPSEC:
|
|
case PRIV_NETINET_BINDANY:
|
|
|
|
#ifdef notyet
|
|
/*
|
|
* IPX/SPX privileges.
|
|
*/
|
|
case PRIV_NETIPX_RESERVEDPORT:
|
|
case PRIV_NETIPX_RAW:
|
|
|
|
/*
|
|
* NCP privileges.
|
|
*/
|
|
case PRIV_NETNCP:
|
|
|
|
/*
|
|
* SMB privileges.
|
|
*/
|
|
case PRIV_NETSMB:
|
|
#endif
|
|
|
|
/*
|
|
* No default: or deny here.
|
|
* In case of no permit fall through to next switch().
|
|
*/
|
|
if (cred->cr_prison->pr_flags & PR_VNET)
|
|
return (0);
|
|
}
|
|
#endif /* VIMAGE */
|
|
|
|
switch (priv) {
|
|
|
|
/*
|
|
* Allow ktrace privileges for root in jail.
|
|
*/
|
|
case PRIV_KTRACE:
|
|
|
|
#if 0
|
|
/*
|
|
* Allow jailed processes to configure audit identity and
|
|
* submit audit records (login, etc). In the future we may
|
|
* want to further refine the relationship between audit and
|
|
* jail.
|
|
*/
|
|
case PRIV_AUDIT_GETAUDIT:
|
|
case PRIV_AUDIT_SETAUDIT:
|
|
case PRIV_AUDIT_SUBMIT:
|
|
#endif
|
|
|
|
/*
|
|
* Allow jailed processes to manipulate process UNIX
|
|
* credentials in any way they see fit.
|
|
*/
|
|
case PRIV_CRED_SETUID:
|
|
case PRIV_CRED_SETEUID:
|
|
case PRIV_CRED_SETGID:
|
|
case PRIV_CRED_SETEGID:
|
|
case PRIV_CRED_SETGROUPS:
|
|
case PRIV_CRED_SETREUID:
|
|
case PRIV_CRED_SETREGID:
|
|
case PRIV_CRED_SETRESUID:
|
|
case PRIV_CRED_SETRESGID:
|
|
|
|
/*
|
|
* Jail implements visibility constraints already, so allow
|
|
* jailed root to override uid/gid-based constraints.
|
|
*/
|
|
case PRIV_SEEOTHERGIDS:
|
|
case PRIV_SEEOTHERUIDS:
|
|
|
|
/*
|
|
* Jail implements inter-process debugging limits already, so
|
|
* allow jailed root various debugging privileges.
|
|
*/
|
|
case PRIV_DEBUG_DIFFCRED:
|
|
case PRIV_DEBUG_SUGID:
|
|
case PRIV_DEBUG_UNPRIV:
|
|
|
|
/*
|
|
* Allow jail to set various resource limits and login
|
|
* properties, and for now, exceed process resource limits.
|
|
*/
|
|
case PRIV_PROC_LIMIT:
|
|
case PRIV_PROC_SETLOGIN:
|
|
case PRIV_PROC_SETRLIMIT:
|
|
|
|
/*
|
|
* System V and POSIX IPC privileges are granted in jail.
|
|
*/
|
|
case PRIV_IPC_READ:
|
|
case PRIV_IPC_WRITE:
|
|
case PRIV_IPC_ADMIN:
|
|
case PRIV_IPC_MSGSIZE:
|
|
case PRIV_MQ_ADMIN:
|
|
|
|
/*
|
|
* Jail operations within a jail work on child jails.
|
|
*/
|
|
case PRIV_JAIL_ATTACH:
|
|
case PRIV_JAIL_SET:
|
|
case PRIV_JAIL_REMOVE:
|
|
|
|
/*
|
|
* Jail implements its own inter-process limits, so allow
|
|
* root processes in jail to change scheduling on other
|
|
* processes in the same jail. Likewise for signalling.
|
|
*/
|
|
case PRIV_SCHED_DIFFCRED:
|
|
case PRIV_SCHED_CPUSET:
|
|
case PRIV_SIGNAL_DIFFCRED:
|
|
case PRIV_SIGNAL_SUGID:
|
|
|
|
/*
|
|
* Allow jailed processes to write to sysctls marked as jail
|
|
* writable.
|
|
*/
|
|
case PRIV_SYSCTL_WRITEJAIL:
|
|
|
|
/*
|
|
* Allow root in jail to manage a variety of quota
|
|
* properties. These should likely be conditional on a
|
|
* configuration option.
|
|
*/
|
|
case PRIV_VFS_GETQUOTA:
|
|
case PRIV_VFS_SETQUOTA:
|
|
|
|
/*
|
|
* Since Jail relies on chroot() to implement file system
|
|
* protections, grant many VFS privileges to root in jail.
|
|
* Be careful to exclude mount-related and NFS-related
|
|
* privileges.
|
|
*/
|
|
case PRIV_VFS_READ:
|
|
case PRIV_VFS_WRITE:
|
|
case PRIV_VFS_ADMIN:
|
|
case PRIV_VFS_EXEC:
|
|
case PRIV_VFS_LOOKUP:
|
|
case PRIV_VFS_BLOCKRESERVE: /* XXXRW: Slightly surprising. */
|
|
case PRIV_VFS_CHFLAGS_DEV:
|
|
case PRIV_VFS_CHOWN:
|
|
case PRIV_VFS_CHROOT:
|
|
case PRIV_VFS_RETAINSUGID:
|
|
case PRIV_VFS_FCHROOT:
|
|
case PRIV_VFS_LINK:
|
|
case PRIV_VFS_SETGID:
|
|
case PRIV_VFS_STAT:
|
|
case PRIV_VFS_STICKYFILE:
|
|
return (0);
|
|
|
|
/*
|
|
* Depending on the global setting, allow privilege of
|
|
* setting system flags.
|
|
*/
|
|
case PRIV_VFS_SYSFLAGS:
|
|
if (cred->cr_prison->pr_allow & PR_ALLOW_CHFLAGS)
|
|
return (0);
|
|
else
|
|
return (EPERM);
|
|
|
|
/*
|
|
* Depending on the global setting, allow privilege of
|
|
* mounting/unmounting file systems.
|
|
*/
|
|
case PRIV_VFS_MOUNT:
|
|
case PRIV_VFS_UNMOUNT:
|
|
case PRIV_VFS_MOUNT_NONUSER:
|
|
case PRIV_VFS_MOUNT_OWNER:
|
|
if (cred->cr_prison->pr_allow & PR_ALLOW_MOUNT &&
|
|
cred->cr_prison->pr_enforce_statfs < 2)
|
|
return (0);
|
|
else
|
|
return (EPERM);
|
|
|
|
/*
|
|
* Allow jailed root to bind reserved ports and reuse in-use
|
|
* ports.
|
|
*/
|
|
case PRIV_NETINET_RESERVEDPORT:
|
|
case PRIV_NETINET_REUSEPORT:
|
|
return (0);
|
|
|
|
/*
|
|
* Allow jailed root to set certian IPv4/6 (option) headers.
|
|
*/
|
|
case PRIV_NETINET_SETHDROPTS:
|
|
return (0);
|
|
|
|
/*
|
|
* Conditionally allow creating raw sockets in jail.
|
|
*/
|
|
case PRIV_NETINET_RAW:
|
|
if (cred->cr_prison->pr_allow & PR_ALLOW_RAW_SOCKETS)
|
|
return (0);
|
|
else
|
|
return (EPERM);
|
|
|
|
/*
|
|
* Since jail implements its own visibility limits on netstat
|
|
* sysctls, allow getcred. This allows identd to work in
|
|
* jail.
|
|
*/
|
|
case PRIV_NETINET_GETCRED:
|
|
return (0);
|
|
|
|
/*
|
|
* Allow jailed root to set loginclass.
|
|
*/
|
|
case PRIV_PROC_SETLOGINCLASS:
|
|
return (0);
|
|
|
|
default:
|
|
/*
|
|
* In all remaining cases, deny the privilege request. This
|
|
* includes almost all network privileges, many system
|
|
* configuration privileges.
|
|
*/
|
|
return (EPERM);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return the part of pr2's name that is relative to pr1, or the whole name
|
|
* if it does not directly follow.
|
|
*/
|
|
|
|
char *
|
|
prison_name(struct prison *pr1, struct prison *pr2)
|
|
{
|
|
char *name;
|
|
|
|
/* Jails see themselves as "0" (if they see themselves at all). */
|
|
if (pr1 == pr2)
|
|
return "0";
|
|
name = pr2->pr_name;
|
|
if (prison_ischild(pr1, pr2)) {
|
|
/*
|
|
* pr1 isn't locked (and allprison_lock may not be either)
|
|
* so its length can't be counted on. But the number of dots
|
|
* can be counted on - and counted.
|
|
*/
|
|
for (; pr1 != &prison0; pr1 = pr1->pr_parent)
|
|
name = strchr(name, '.') + 1;
|
|
}
|
|
return (name);
|
|
}
|
|
|
|
/*
|
|
* Return the part of pr2's path that is relative to pr1, or the whole path
|
|
* if it does not directly follow.
|
|
*/
|
|
static char *
|
|
prison_path(struct prison *pr1, struct prison *pr2)
|
|
{
|
|
char *path1, *path2;
|
|
int len1;
|
|
|
|
path1 = pr1->pr_path;
|
|
path2 = pr2->pr_path;
|
|
if (!strcmp(path1, "/"))
|
|
return (path2);
|
|
len1 = strlen(path1);
|
|
if (strncmp(path1, path2, len1))
|
|
return (path2);
|
|
if (path2[len1] == '\0')
|
|
return "/";
|
|
if (path2[len1] == '/')
|
|
return (path2 + len1);
|
|
return (path2);
|
|
}
|
|
|
|
|
|
/*
|
|
* Jail-related sysctls.
|
|
*/
|
|
static SYSCTL_NODE(_security, OID_AUTO, jail, CTLFLAG_RW, 0,
|
|
"Jails");
|
|
|
|
static int
|
|
sysctl_jail_list(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct xprison *xp;
|
|
struct prison *pr, *cpr;
|
|
#ifdef INET
|
|
struct in_addr *ip4 = NULL;
|
|
int ip4s = 0;
|
|
#endif
|
|
#ifdef INET6
|
|
struct in6_addr *ip6 = NULL;
|
|
int ip6s = 0;
|
|
#endif
|
|
int descend, error;
|
|
|
|
xp = malloc(sizeof(*xp), M_TEMP, M_WAITOK);
|
|
pr = req->td->td_ucred->cr_prison;
|
|
error = 0;
|
|
sx_slock(&allprison_lock);
|
|
FOREACH_PRISON_DESCENDANT(pr, cpr, descend) {
|
|
#if defined(INET) || defined(INET6)
|
|
again:
|
|
#endif
|
|
mtx_lock(&cpr->pr_mtx);
|
|
#ifdef INET
|
|
if (cpr->pr_ip4s > 0) {
|
|
if (ip4s < cpr->pr_ip4s) {
|
|
ip4s = cpr->pr_ip4s;
|
|
mtx_unlock(&cpr->pr_mtx);
|
|
ip4 = realloc(ip4, ip4s *
|
|
sizeof(struct in_addr), M_TEMP, M_WAITOK);
|
|
goto again;
|
|
}
|
|
bcopy(cpr->pr_ip4, ip4,
|
|
cpr->pr_ip4s * sizeof(struct in_addr));
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (cpr->pr_ip6s > 0) {
|
|
if (ip6s < cpr->pr_ip6s) {
|
|
ip6s = cpr->pr_ip6s;
|
|
mtx_unlock(&cpr->pr_mtx);
|
|
ip6 = realloc(ip6, ip6s *
|
|
sizeof(struct in6_addr), M_TEMP, M_WAITOK);
|
|
goto again;
|
|
}
|
|
bcopy(cpr->pr_ip6, ip6,
|
|
cpr->pr_ip6s * sizeof(struct in6_addr));
|
|
}
|
|
#endif
|
|
if (cpr->pr_ref == 0) {
|
|
mtx_unlock(&cpr->pr_mtx);
|
|
continue;
|
|
}
|
|
bzero(xp, sizeof(*xp));
|
|
xp->pr_version = XPRISON_VERSION;
|
|
xp->pr_id = cpr->pr_id;
|
|
xp->pr_state = cpr->pr_uref > 0
|
|
? PRISON_STATE_ALIVE : PRISON_STATE_DYING;
|
|
strlcpy(xp->pr_path, prison_path(pr, cpr), sizeof(xp->pr_path));
|
|
strlcpy(xp->pr_host, cpr->pr_hostname, sizeof(xp->pr_host));
|
|
strlcpy(xp->pr_name, prison_name(pr, cpr), sizeof(xp->pr_name));
|
|
#ifdef INET
|
|
xp->pr_ip4s = cpr->pr_ip4s;
|
|
#endif
|
|
#ifdef INET6
|
|
xp->pr_ip6s = cpr->pr_ip6s;
|
|
#endif
|
|
mtx_unlock(&cpr->pr_mtx);
|
|
error = SYSCTL_OUT(req, xp, sizeof(*xp));
|
|
if (error)
|
|
break;
|
|
#ifdef INET
|
|
if (xp->pr_ip4s > 0) {
|
|
error = SYSCTL_OUT(req, ip4,
|
|
xp->pr_ip4s * sizeof(struct in_addr));
|
|
if (error)
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (xp->pr_ip6s > 0) {
|
|
error = SYSCTL_OUT(req, ip6,
|
|
xp->pr_ip6s * sizeof(struct in6_addr));
|
|
if (error)
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
sx_sunlock(&allprison_lock);
|
|
free(xp, M_TEMP);
|
|
#ifdef INET
|
|
free(ip4, M_TEMP);
|
|
#endif
|
|
#ifdef INET6
|
|
free(ip6, M_TEMP);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_OID(_security_jail, OID_AUTO, list,
|
|
CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
|
|
sysctl_jail_list, "S", "List of active jails");
|
|
|
|
static int
|
|
sysctl_jail_jailed(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int error, injail;
|
|
|
|
injail = jailed(req->td->td_ucred);
|
|
error = SYSCTL_OUT(req, &injail, sizeof(injail));
|
|
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, jailed,
|
|
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
|
|
sysctl_jail_jailed, "I", "Process in jail?");
|
|
|
|
#if defined(INET) || defined(INET6)
|
|
SYSCTL_UINT(_security_jail, OID_AUTO, jail_max_af_ips, CTLFLAG_RW,
|
|
&jail_max_af_ips, 0,
|
|
"Number of IP addresses a jail may have at most per address family");
|
|
#endif
|
|
|
|
/*
|
|
* Default parameters for jail(2) compatability. For historical reasons,
|
|
* the sysctl names have varying similarity to the parameter names. Prisons
|
|
* just see their own parameters, and can't change them.
|
|
*/
|
|
static int
|
|
sysctl_jail_default_allow(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct prison *pr;
|
|
int allow, error, i;
|
|
|
|
pr = req->td->td_ucred->cr_prison;
|
|
allow = (pr == &prison0) ? jail_default_allow : pr->pr_allow;
|
|
|
|
/* Get the current flag value, and convert it to a boolean. */
|
|
i = (allow & arg2) ? 1 : 0;
|
|
if (arg1 != NULL)
|
|
i = !i;
|
|
error = sysctl_handle_int(oidp, &i, 0, req);
|
|
if (error || !req->newptr)
|
|
return (error);
|
|
i = i ? arg2 : 0;
|
|
if (arg1 != NULL)
|
|
i ^= arg2;
|
|
/*
|
|
* The sysctls don't have CTLFLAGS_PRISON, so assume prison0
|
|
* for writing.
|
|
*/
|
|
mtx_lock(&prison0.pr_mtx);
|
|
jail_default_allow = (jail_default_allow & ~arg2) | i;
|
|
mtx_unlock(&prison0.pr_mtx);
|
|
return (0);
|
|
}
|
|
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, set_hostname_allowed,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
|
|
NULL, PR_ALLOW_SET_HOSTNAME, sysctl_jail_default_allow, "I",
|
|
"Processes in jail can set their hostnames");
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, socket_unixiproute_only,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
|
|
(void *)1, PR_ALLOW_SOCKET_AF, sysctl_jail_default_allow, "I",
|
|
"Processes in jail are limited to creating UNIX/IP/route sockets only");
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, sysvipc_allowed,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
|
|
NULL, PR_ALLOW_SYSVIPC, sysctl_jail_default_allow, "I",
|
|
"Processes in jail can use System V IPC primitives");
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, allow_raw_sockets,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
|
|
NULL, PR_ALLOW_RAW_SOCKETS, sysctl_jail_default_allow, "I",
|
|
"Prison root can create raw sockets");
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, chflags_allowed,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
|
|
NULL, PR_ALLOW_CHFLAGS, sysctl_jail_default_allow, "I",
|
|
"Processes in jail can alter system file flags");
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, mount_allowed,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
|
|
NULL, PR_ALLOW_MOUNT, sysctl_jail_default_allow, "I",
|
|
"Processes in jail can mount/unmount jail-friendly file systems");
|
|
|
|
static int
|
|
sysctl_jail_default_level(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct prison *pr;
|
|
int level, error;
|
|
|
|
pr = req->td->td_ucred->cr_prison;
|
|
level = (pr == &prison0) ? *(int *)arg1 : *(int *)((char *)pr + arg2);
|
|
error = sysctl_handle_int(oidp, &level, 0, req);
|
|
if (error || !req->newptr)
|
|
return (error);
|
|
*(int *)arg1 = level;
|
|
return (0);
|
|
}
|
|
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, enforce_statfs,
|
|
CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
|
|
&jail_default_enforce_statfs, offsetof(struct prison, pr_enforce_statfs),
|
|
sysctl_jail_default_level, "I",
|
|
"Processes in jail cannot see all mounted file systems");
|
|
|
|
SYSCTL_PROC(_security_jail, OID_AUTO, devfs_ruleset,
|
|
CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE,
|
|
&jail_default_devfs_rsnum, offsetof(struct prison, pr_devfs_rsnum),
|
|
sysctl_jail_default_level, "I",
|
|
"Ruleset for the devfs filesystem in jail");
|
|
|
|
/*
|
|
* Nodes to describe jail parameters. Maximum length of string parameters
|
|
* is returned in the string itself, and the other parameters exist merely
|
|
* to make themselves and their types known.
|
|
*/
|
|
SYSCTL_NODE(_security_jail, OID_AUTO, param, CTLFLAG_RW, 0,
|
|
"Jail parameters");
|
|
|
|
int
|
|
sysctl_jail_param(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int i;
|
|
long l;
|
|
size_t s;
|
|
char numbuf[12];
|
|
|
|
switch (oidp->oid_kind & CTLTYPE)
|
|
{
|
|
case CTLTYPE_LONG:
|
|
case CTLTYPE_ULONG:
|
|
l = 0;
|
|
#ifdef SCTL_MASK32
|
|
if (!(req->flags & SCTL_MASK32))
|
|
#endif
|
|
return (SYSCTL_OUT(req, &l, sizeof(l)));
|
|
case CTLTYPE_INT:
|
|
case CTLTYPE_UINT:
|
|
i = 0;
|
|
return (SYSCTL_OUT(req, &i, sizeof(i)));
|
|
case CTLTYPE_STRING:
|
|
snprintf(numbuf, sizeof(numbuf), "%jd", (intmax_t)arg2);
|
|
return
|
|
(sysctl_handle_string(oidp, numbuf, sizeof(numbuf), req));
|
|
case CTLTYPE_STRUCT:
|
|
s = (size_t)arg2;
|
|
return (SYSCTL_OUT(req, &s, sizeof(s)));
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
SYSCTL_JAIL_PARAM(, jid, CTLTYPE_INT | CTLFLAG_RDTUN, "I", "Jail ID");
|
|
SYSCTL_JAIL_PARAM(, parent, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail parent ID");
|
|
SYSCTL_JAIL_PARAM_STRING(, name, CTLFLAG_RW, MAXHOSTNAMELEN, "Jail name");
|
|
SYSCTL_JAIL_PARAM_STRING(, path, CTLFLAG_RDTUN, MAXPATHLEN, "Jail root path");
|
|
SYSCTL_JAIL_PARAM(, securelevel, CTLTYPE_INT | CTLFLAG_RW,
|
|
"I", "Jail secure level");
|
|
SYSCTL_JAIL_PARAM(, enforce_statfs, CTLTYPE_INT | CTLFLAG_RW,
|
|
"I", "Jail cannot see all mounted file systems");
|
|
SYSCTL_JAIL_PARAM(, devfs_ruleset, CTLTYPE_INT | CTLFLAG_RW,
|
|
"I", "Ruleset for in-jail devfs mounts");
|
|
SYSCTL_JAIL_PARAM(, persist, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Jail persistence");
|
|
#ifdef VIMAGE
|
|
SYSCTL_JAIL_PARAM(, vnet, CTLTYPE_INT | CTLFLAG_RDTUN,
|
|
"E,jailsys", "Virtual network stack");
|
|
#endif
|
|
SYSCTL_JAIL_PARAM(, dying, CTLTYPE_INT | CTLFLAG_RD,
|
|
"B", "Jail is in the process of shutting down");
|
|
|
|
SYSCTL_JAIL_PARAM_NODE(children, "Number of child jails");
|
|
SYSCTL_JAIL_PARAM(_children, cur, CTLTYPE_INT | CTLFLAG_RD,
|
|
"I", "Current number of child jails");
|
|
SYSCTL_JAIL_PARAM(_children, max, CTLTYPE_INT | CTLFLAG_RW,
|
|
"I", "Maximum number of child jails");
|
|
|
|
SYSCTL_JAIL_PARAM_SYS_NODE(host, CTLFLAG_RW, "Jail host info");
|
|
SYSCTL_JAIL_PARAM_STRING(_host, hostname, CTLFLAG_RW, MAXHOSTNAMELEN,
|
|
"Jail hostname");
|
|
SYSCTL_JAIL_PARAM_STRING(_host, domainname, CTLFLAG_RW, MAXHOSTNAMELEN,
|
|
"Jail NIS domainname");
|
|
SYSCTL_JAIL_PARAM_STRING(_host, hostuuid, CTLFLAG_RW, HOSTUUIDLEN,
|
|
"Jail host UUID");
|
|
SYSCTL_JAIL_PARAM(_host, hostid, CTLTYPE_ULONG | CTLFLAG_RW,
|
|
"LU", "Jail host ID");
|
|
|
|
SYSCTL_JAIL_PARAM_NODE(cpuset, "Jail cpuset");
|
|
SYSCTL_JAIL_PARAM(_cpuset, id, CTLTYPE_INT | CTLFLAG_RD, "I", "Jail cpuset ID");
|
|
|
|
#ifdef INET
|
|
SYSCTL_JAIL_PARAM_SYS_NODE(ip4, CTLFLAG_RDTUN,
|
|
"Jail IPv4 address virtualization");
|
|
SYSCTL_JAIL_PARAM_STRUCT(_ip4, addr, CTLFLAG_RW, sizeof(struct in_addr),
|
|
"S,in_addr,a", "Jail IPv4 addresses");
|
|
SYSCTL_JAIL_PARAM(_ip4, saddrsel, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Do (not) use IPv4 source address selection rather than the "
|
|
"primary jail IPv4 address.");
|
|
#endif
|
|
#ifdef INET6
|
|
SYSCTL_JAIL_PARAM_SYS_NODE(ip6, CTLFLAG_RDTUN,
|
|
"Jail IPv6 address virtualization");
|
|
SYSCTL_JAIL_PARAM_STRUCT(_ip6, addr, CTLFLAG_RW, sizeof(struct in6_addr),
|
|
"S,in6_addr,a", "Jail IPv6 addresses");
|
|
SYSCTL_JAIL_PARAM(_ip6, saddrsel, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Do (not) use IPv6 source address selection rather than the "
|
|
"primary jail IPv6 address.");
|
|
#endif
|
|
|
|
SYSCTL_JAIL_PARAM_NODE(allow, "Jail permission flags");
|
|
SYSCTL_JAIL_PARAM(_allow, set_hostname, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Jail may set hostname");
|
|
SYSCTL_JAIL_PARAM(_allow, sysvipc, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Jail may use SYSV IPC");
|
|
SYSCTL_JAIL_PARAM(_allow, raw_sockets, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Jail may create raw sockets");
|
|
SYSCTL_JAIL_PARAM(_allow, chflags, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Jail may alter system file flags");
|
|
SYSCTL_JAIL_PARAM(_allow, mount, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Jail may mount/unmount jail-friendly file systems");
|
|
SYSCTL_JAIL_PARAM(_allow, quotas, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Jail may set file quotas");
|
|
SYSCTL_JAIL_PARAM(_allow, socket_af, CTLTYPE_INT | CTLFLAG_RW,
|
|
"B", "Jail may create sockets other than just UNIX/IPv4/IPv6/route");
|
|
|
|
void
|
|
prison_racct_foreach(void (*callback)(struct racct *racct,
|
|
void *arg2, void *arg3), void *arg2, void *arg3)
|
|
{
|
|
struct prison_racct *prr;
|
|
|
|
sx_slock(&allprison_lock);
|
|
LIST_FOREACH(prr, &allprison_racct, prr_next)
|
|
(callback)(prr->prr_racct, arg2, arg3);
|
|
sx_sunlock(&allprison_lock);
|
|
}
|
|
|
|
static struct prison_racct *
|
|
prison_racct_find_locked(const char *name)
|
|
{
|
|
struct prison_racct *prr;
|
|
|
|
sx_assert(&allprison_lock, SA_XLOCKED);
|
|
|
|
if (name[0] == '\0' || strlen(name) >= MAXHOSTNAMELEN)
|
|
return (NULL);
|
|
|
|
LIST_FOREACH(prr, &allprison_racct, prr_next) {
|
|
if (strcmp(name, prr->prr_name) != 0)
|
|
continue;
|
|
|
|
/* Found prison_racct with a matching name? */
|
|
prison_racct_hold(prr);
|
|
return (prr);
|
|
}
|
|
|
|
/* Add new prison_racct. */
|
|
prr = malloc(sizeof(*prr), M_PRISON_RACCT, M_ZERO | M_WAITOK);
|
|
racct_create(&prr->prr_racct);
|
|
|
|
strcpy(prr->prr_name, name);
|
|
refcount_init(&prr->prr_refcount, 1);
|
|
LIST_INSERT_HEAD(&allprison_racct, prr, prr_next);
|
|
|
|
return (prr);
|
|
}
|
|
|
|
struct prison_racct *
|
|
prison_racct_find(const char *name)
|
|
{
|
|
struct prison_racct *prr;
|
|
|
|
sx_xlock(&allprison_lock);
|
|
prr = prison_racct_find_locked(name);
|
|
sx_xunlock(&allprison_lock);
|
|
return (prr);
|
|
}
|
|
|
|
void
|
|
prison_racct_hold(struct prison_racct *prr)
|
|
{
|
|
|
|
refcount_acquire(&prr->prr_refcount);
|
|
}
|
|
|
|
void
|
|
prison_racct_free(struct prison_racct *prr)
|
|
{
|
|
int old;
|
|
|
|
old = prr->prr_refcount;
|
|
if (old > 1 && atomic_cmpset_int(&prr->prr_refcount, old, old - 1))
|
|
return;
|
|
|
|
sx_xlock(&allprison_lock);
|
|
if (refcount_release(&prr->prr_refcount)) {
|
|
racct_destroy(&prr->prr_racct);
|
|
LIST_REMOVE(prr, prr_next);
|
|
sx_xunlock(&allprison_lock);
|
|
free(prr, M_PRISON_RACCT);
|
|
|
|
return;
|
|
}
|
|
sx_xunlock(&allprison_lock);
|
|
}
|
|
|
|
#ifdef RACCT
|
|
static void
|
|
prison_racct_attach(struct prison *pr)
|
|
{
|
|
struct prison_racct *prr;
|
|
|
|
prr = prison_racct_find_locked(pr->pr_name);
|
|
KASSERT(prr != NULL, ("cannot find prison_racct"));
|
|
|
|
pr->pr_prison_racct = prr;
|
|
}
|
|
|
|
static void
|
|
prison_racct_detach(struct prison *pr)
|
|
{
|
|
prison_racct_free(pr->pr_prison_racct);
|
|
pr->pr_prison_racct = NULL;
|
|
}
|
|
#endif /* RACCT */
|
|
|
|
#ifdef DDB
|
|
|
|
static void
|
|
db_show_prison(struct prison *pr)
|
|
{
|
|
int fi;
|
|
#if defined(INET) || defined(INET6)
|
|
int ii;
|
|
#endif
|
|
unsigned jsf;
|
|
#ifdef INET6
|
|
char ip6buf[INET6_ADDRSTRLEN];
|
|
#endif
|
|
|
|
db_printf("prison %p:\n", pr);
|
|
db_printf(" jid = %d\n", pr->pr_id);
|
|
db_printf(" name = %s\n", pr->pr_name);
|
|
db_printf(" parent = %p\n", pr->pr_parent);
|
|
db_printf(" ref = %d\n", pr->pr_ref);
|
|
db_printf(" uref = %d\n", pr->pr_uref);
|
|
db_printf(" path = %s\n", pr->pr_path);
|
|
db_printf(" cpuset = %d\n", pr->pr_cpuset
|
|
? pr->pr_cpuset->cs_id : -1);
|
|
#ifdef VIMAGE
|
|
db_printf(" vnet = %p\n", pr->pr_vnet);
|
|
#endif
|
|
db_printf(" root = %p\n", pr->pr_root);
|
|
db_printf(" securelevel = %d\n", pr->pr_securelevel);
|
|
db_printf(" devfs_rsnum = %d\n", pr->pr_devfs_rsnum);
|
|
db_printf(" children.max = %d\n", pr->pr_childmax);
|
|
db_printf(" children.cur = %d\n", pr->pr_childcount);
|
|
db_printf(" child = %p\n", LIST_FIRST(&pr->pr_children));
|
|
db_printf(" sibling = %p\n", LIST_NEXT(pr, pr_sibling));
|
|
db_printf(" flags = 0x%x", pr->pr_flags);
|
|
for (fi = 0; fi < sizeof(pr_flag_names) / sizeof(pr_flag_names[0]);
|
|
fi++)
|
|
if (pr_flag_names[fi] != NULL && (pr->pr_flags & (1 << fi)))
|
|
db_printf(" %s", pr_flag_names[fi]);
|
|
for (fi = 0; fi < sizeof(pr_flag_jailsys) / sizeof(pr_flag_jailsys[0]);
|
|
fi++) {
|
|
jsf = pr->pr_flags &
|
|
(pr_flag_jailsys[fi].disable | pr_flag_jailsys[fi].new);
|
|
db_printf(" %-16s= %s\n", pr_flag_jailsys[fi].name,
|
|
pr_flag_jailsys[fi].disable &&
|
|
(jsf == pr_flag_jailsys[fi].disable) ? "disable"
|
|
: (jsf == pr_flag_jailsys[fi].new) ? "new"
|
|
: "inherit");
|
|
}
|
|
db_printf(" allow = 0x%x", pr->pr_allow);
|
|
for (fi = 0; fi < sizeof(pr_allow_names) / sizeof(pr_allow_names[0]);
|
|
fi++)
|
|
if (pr_allow_names[fi] != NULL && (pr->pr_allow & (1 << fi)))
|
|
db_printf(" %s", pr_allow_names[fi]);
|
|
db_printf("\n");
|
|
db_printf(" enforce_statfs = %d\n", pr->pr_enforce_statfs);
|
|
db_printf(" host.hostname = %s\n", pr->pr_hostname);
|
|
db_printf(" host.domainname = %s\n", pr->pr_domainname);
|
|
db_printf(" host.hostuuid = %s\n", pr->pr_hostuuid);
|
|
db_printf(" host.hostid = %lu\n", pr->pr_hostid);
|
|
#ifdef INET
|
|
db_printf(" ip4s = %d\n", pr->pr_ip4s);
|
|
for (ii = 0; ii < pr->pr_ip4s; ii++)
|
|
db_printf(" %s %s\n",
|
|
ii == 0 ? "ip4.addr =" : " ",
|
|
inet_ntoa(pr->pr_ip4[ii]));
|
|
#endif
|
|
#ifdef INET6
|
|
db_printf(" ip6s = %d\n", pr->pr_ip6s);
|
|
for (ii = 0; ii < pr->pr_ip6s; ii++)
|
|
db_printf(" %s %s\n",
|
|
ii == 0 ? "ip6.addr =" : " ",
|
|
ip6_sprintf(ip6buf, &pr->pr_ip6[ii]));
|
|
#endif
|
|
}
|
|
|
|
DB_SHOW_COMMAND(prison, db_show_prison_command)
|
|
{
|
|
struct prison *pr;
|
|
|
|
if (!have_addr) {
|
|
/*
|
|
* Show all prisons in the list, and prison0 which is not
|
|
* listed.
|
|
*/
|
|
db_show_prison(&prison0);
|
|
if (!db_pager_quit) {
|
|
TAILQ_FOREACH(pr, &allprison, pr_list) {
|
|
db_show_prison(pr);
|
|
if (db_pager_quit)
|
|
break;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (addr == 0)
|
|
pr = &prison0;
|
|
else {
|
|
/* Look for a prison with the ID and with references. */
|
|
TAILQ_FOREACH(pr, &allprison, pr_list)
|
|
if (pr->pr_id == addr && pr->pr_ref > 0)
|
|
break;
|
|
if (pr == NULL)
|
|
/* Look again, without requiring a reference. */
|
|
TAILQ_FOREACH(pr, &allprison, pr_list)
|
|
if (pr->pr_id == addr)
|
|
break;
|
|
if (pr == NULL)
|
|
/* Assume address points to a valid prison. */
|
|
pr = (struct prison *)addr;
|
|
}
|
|
db_show_prison(pr);
|
|
}
|
|
|
|
#endif /* DDB */
|