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| Current File : //sys/sys/jail.h |
/*-
* Copyright (c) 1999 Poul-Henning Kamp.
* Copyright (c) 2009 James Gritton.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: release/9.1.0/sys/sys/jail.h 232728 2012-03-09 16:17:46Z mm $
*/
#ifndef _SYS_JAIL_H_
#define _SYS_JAIL_H_
#ifdef _KERNEL
struct jail_v0 {
u_int32_t version;
char *path;
char *hostname;
u_int32_t ip_number;
};
#endif
struct jail {
uint32_t version;
char *path;
char *hostname;
char *jailname;
uint32_t ip4s;
uint32_t ip6s;
struct in_addr *ip4;
struct in6_addr *ip6;
};
#define JAIL_API_VERSION 2
/*
* For all xprison structs, always keep the pr_version an int and
* the first variable so userspace can easily distinguish them.
*/
#ifndef _KERNEL
struct xprison_v1 {
int pr_version;
int pr_id;
char pr_path[MAXPATHLEN];
char pr_host[MAXHOSTNAMELEN];
u_int32_t pr_ip;
};
#endif
struct xprison {
int pr_version;
int pr_id;
int pr_state;
cpusetid_t pr_cpusetid;
char pr_path[MAXPATHLEN];
char pr_host[MAXHOSTNAMELEN];
char pr_name[MAXHOSTNAMELEN];
uint32_t pr_ip4s;
uint32_t pr_ip6s;
#if 0
/*
* sizeof(xprison) will be malloced + size needed for all
* IPv4 and IPv6 addesses. Offsets are based numbers of addresses.
*/
struct in_addr pr_ip4[];
struct in6_addr pr_ip6[];
#endif
};
#define XPRISON_VERSION 3
#define PRISON_STATE_INVALID 0
#define PRISON_STATE_ALIVE 1
#define PRISON_STATE_DYING 2
/*
* Flags for jail_set and jail_get.
*/
#define JAIL_CREATE 0x01 /* Create jail if it doesn't exist */
#define JAIL_UPDATE 0x02 /* Update parameters of existing jail */
#define JAIL_ATTACH 0x04 /* Attach to jail upon creation */
#define JAIL_DYING 0x08 /* Allow getting a dying jail */
#define JAIL_SET_MASK 0x0f
#define JAIL_GET_MASK 0x08
#define JAIL_SYS_DISABLE 0
#define JAIL_SYS_NEW 1
#define JAIL_SYS_INHERIT 2
#ifndef _KERNEL
struct iovec;
int jail(struct jail *);
int jail_set(struct iovec *, unsigned int, int);
int jail_get(struct iovec *, unsigned int, int);
int jail_attach(int);
int jail_remove(int);
#else /* _KERNEL */
#include <sys/queue.h>
#include <sys/sysctl.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/_task.h>
#define JAIL_MAX 999999
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_PRISON);
#endif
#endif /* _KERNEL */
#if defined(_KERNEL) || defined(_WANT_PRISON)
#include <sys/osd.h>
#define HOSTUUIDLEN 64
struct racct;
struct prison_racct;
/*
* This structure describes a prison. It is pointed to by all struct
* ucreds's of the inmates. pr_ref keeps track of them and is used to
* delete the struture when the last inmate is dead.
*
* Lock key:
* (a) allprison_lock
* (p) locked by pr_mtx
* (c) set only during creation before the structure is shared, no mutex
* required to read
* (d) set only during destruction of jail, no mutex needed
*/
struct prison {
TAILQ_ENTRY(prison) pr_list; /* (a) all prisons */
int pr_id; /* (c) prison id */
int pr_ref; /* (p) refcount */
int pr_uref; /* (p) user (alive) refcount */
unsigned pr_flags; /* (p) PR_* flags */
LIST_HEAD(, prison) pr_children; /* (a) list of child jails */
LIST_ENTRY(prison) pr_sibling; /* (a) next in parent's list */
struct prison *pr_parent; /* (c) containing jail */
struct mtx pr_mtx;
struct task pr_task; /* (d) destroy task */
struct osd pr_osd; /* (p) additional data */
struct cpuset *pr_cpuset; /* (p) cpuset */
struct vnet *pr_vnet; /* (c) network stack */
struct vnode *pr_root; /* (c) vnode to rdir */
int pr_ip4s; /* (p) number of v4 IPs */
int pr_ip6s; /* (p) number of v6 IPs */
struct in_addr *pr_ip4; /* (p) v4 IPs of jail */
struct in6_addr *pr_ip6; /* (p) v6 IPs of jail */
struct prison_racct *pr_prison_racct; /* (c) racct jail proxy */
void *pr_sparep[3];
int pr_childcount; /* (a) number of child jails */
int pr_childmax; /* (p) maximum child jails */
unsigned pr_allow; /* (p) PR_ALLOW_* flags */
int pr_securelevel; /* (p) securelevel */
int pr_enforce_statfs; /* (p) statfs permission */
int pr_devfs_rsnum; /* (p) devfs ruleset */
int pr_spare[4];
unsigned long pr_hostid; /* (p) jail hostid */
char pr_name[MAXHOSTNAMELEN]; /* (p) admin jail name */
char pr_path[MAXPATHLEN]; /* (c) chroot path */
char pr_hostname[MAXHOSTNAMELEN]; /* (p) jail hostname */
char pr_domainname[MAXHOSTNAMELEN]; /* (p) jail domainname */
char pr_hostuuid[HOSTUUIDLEN]; /* (p) jail hostuuid */
};
struct prison_racct {
LIST_ENTRY(prison_racct) prr_next;
char prr_name[MAXHOSTNAMELEN];
u_int prr_refcount;
struct racct *prr_racct;
};
#endif /* _KERNEL || _WANT_PRISON */
#ifdef _KERNEL
/* Flag bits set via options */
#define PR_PERSIST 0x00000001 /* Can exist without processes */
#define PR_HOST 0x00000002 /* Virtualize hostname et al */
#define PR_IP4_USER 0x00000004 /* Restrict IPv4 addresses */
#define PR_IP6_USER 0x00000008 /* Restrict IPv6 addresses */
#define PR_VNET 0x00000010 /* Virtual network stack */
#define PR_IP4_DISABLE 0x00000020 /* Disable IPv4 */
#define PR_IP6_DISABLE 0x00000040 /* Disable IPv6 */
#define PR_IP4_SADDRSEL 0x00000080 /* Do IPv4 src addr sel. or use the */
/* primary jail address. */
#define PR_IP6_SADDRSEL 0x00000100 /* Do IPv6 src addr sel. or use the */
/* primary jail address. */
/* Internal flag bits */
#define PR_REMOVE 0x01000000 /* In process of being removed */
#define PR_IP4 0x02000000 /* IPv4 restricted or disabled */
/* by this jail or an ancestor */
#define PR_IP6 0x04000000 /* IPv6 restricted or disabled */
/* by this jail or an ancestor */
/* Flags for pr_allow */
#define PR_ALLOW_SET_HOSTNAME 0x0001
#define PR_ALLOW_SYSVIPC 0x0002
#define PR_ALLOW_RAW_SOCKETS 0x0004
#define PR_ALLOW_CHFLAGS 0x0008
#define PR_ALLOW_MOUNT 0x0010
#define PR_ALLOW_QUOTAS 0x0020
#define PR_ALLOW_SOCKET_AF 0x0040
#define PR_ALLOW_MOUNT_DEVFS 0x0080
#define PR_ALLOW_MOUNT_NULLFS 0x0100
#define PR_ALLOW_MOUNT_ZFS 0x0200
#define PR_ALLOW_MOUNT_PROCFS 0x0400
#define PR_ALLOW_ALL 0x07ff
/*
* OSD methods
*/
#define PR_METHOD_CREATE 0
#define PR_METHOD_GET 1
#define PR_METHOD_SET 2
#define PR_METHOD_CHECK 3
#define PR_METHOD_ATTACH 4
#define PR_MAXMETHOD 5
/*
* Lock/unlock a prison.
* XXX These exist not so much for general convenience, but to be useable in
* the FOREACH_PRISON_DESCENDANT_LOCKED macro which can't handle them in
* non-function form as currently defined.
*/
static __inline void
prison_lock(struct prison *pr)
{
mtx_lock(&pr->pr_mtx);
}
static __inline void
prison_unlock(struct prison *pr)
{
mtx_unlock(&pr->pr_mtx);
}
/* Traverse a prison's immediate children. */
#define FOREACH_PRISON_CHILD(ppr, cpr) \
LIST_FOREACH(cpr, &(ppr)->pr_children, pr_sibling)
/*
* Preorder traversal of all of a prison's descendants.
* This ugly loop allows the macro to be followed by a single block
* as expected in a looping primitive.
*/
#define FOREACH_PRISON_DESCENDANT(ppr, cpr, descend) \
for ((cpr) = (ppr), (descend) = 1; \
((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \
? LIST_FIRST(&(cpr)->pr_children) \
: ((cpr) == (ppr) \
? NULL \
: (((descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \
? LIST_NEXT(cpr, pr_sibling) \
: (cpr)->pr_parent))));) \
if (!(descend)) \
; \
else
/*
* As above, but lock descendants on the way down and unlock on the way up.
*/
#define FOREACH_PRISON_DESCENDANT_LOCKED(ppr, cpr, descend) \
for ((cpr) = (ppr), (descend) = 1; \
((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \
? LIST_FIRST(&(cpr)->pr_children) \
: ((cpr) == (ppr) \
? NULL \
: ((prison_unlock(cpr), \
(descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \
? LIST_NEXT(cpr, pr_sibling) \
: (cpr)->pr_parent))));) \
if ((descend) ? (prison_lock(cpr), 0) : 1) \
; \
else
/*
* As above, but also keep track of the level descended to.
*/
#define FOREACH_PRISON_DESCENDANT_LOCKED_LEVEL(ppr, cpr, descend, level)\
for ((cpr) = (ppr), (descend) = 1, (level) = 0; \
((cpr) = (((descend) && !LIST_EMPTY(&(cpr)->pr_children)) \
? (level++, LIST_FIRST(&(cpr)->pr_children)) \
: ((cpr) == (ppr) \
? NULL \
: ((prison_unlock(cpr), \
(descend) = LIST_NEXT(cpr, pr_sibling) != NULL) \
? LIST_NEXT(cpr, pr_sibling) \
: (level--, (cpr)->pr_parent)))));) \
if ((descend) ? (prison_lock(cpr), 0) : 1) \
; \
else
/*
* Attributes of the physical system, and the root of the jail tree.
*/
extern struct prison prison0;
TAILQ_HEAD(prisonlist, prison);
extern struct prisonlist allprison;
extern struct sx allprison_lock;
/*
* Sysctls to describe jail parameters.
*/
SYSCTL_DECL(_security_jail_param);
#define SYSCTL_JAIL_PARAM(module, param, type, fmt, descr) \
SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \
(type) | CTLFLAG_MPSAFE, NULL, 0, sysctl_jail_param, fmt, descr)
#define SYSCTL_JAIL_PARAM_STRING(module, param, access, len, descr) \
SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \
CTLTYPE_STRING | CTLFLAG_MPSAFE | (access), NULL, len, \
sysctl_jail_param, "A", descr)
#define SYSCTL_JAIL_PARAM_STRUCT(module, param, access, len, fmt, descr)\
SYSCTL_PROC(_security_jail_param ## module, OID_AUTO, param, \
CTLTYPE_STRUCT | CTLFLAG_MPSAFE | (access), NULL, len, \
sysctl_jail_param, fmt, descr)
#define SYSCTL_JAIL_PARAM_NODE(module, descr) \
SYSCTL_NODE(_security_jail_param, OID_AUTO, module, 0, 0, descr)
#define SYSCTL_JAIL_PARAM_SUBNODE(parent, module, descr) \
SYSCTL_NODE(_security_jail_param_##parent, OID_AUTO, module, 0, 0, descr)
#define SYSCTL_JAIL_PARAM_SYS_NODE(module, access, descr) \
SYSCTL_JAIL_PARAM_NODE(module, descr); \
SYSCTL_JAIL_PARAM(_##module, , CTLTYPE_INT | (access), "E,jailsys", \
descr)
/*
* Kernel support functions for jail().
*/
struct ucred;
struct mount;
struct sockaddr;
struct statfs;
int jailed(struct ucred *cred);
int jailed_without_vnet(struct ucred *);
void getcredhostname(struct ucred *, char *, size_t);
void getcreddomainname(struct ucred *, char *, size_t);
void getcredhostuuid(struct ucred *, char *, size_t);
void getcredhostid(struct ucred *, unsigned long *);
int prison_allow(struct ucred *, unsigned);
int prison_check(struct ucred *cred1, struct ucred *cred2);
int prison_owns_vnet(struct ucred *);
int prison_canseemount(struct ucred *cred, struct mount *mp);
void prison_enforce_statfs(struct ucred *cred, struct mount *mp,
struct statfs *sp);
struct prison *prison_find(int prid);
struct prison *prison_find_child(struct prison *, int);
struct prison *prison_find_name(struct prison *, const char *);
int prison_flag(struct ucred *, unsigned);
void prison_free(struct prison *pr);
void prison_free_locked(struct prison *pr);
void prison_hold(struct prison *pr);
void prison_hold_locked(struct prison *pr);
void prison_proc_hold(struct prison *);
void prison_proc_free(struct prison *);
int prison_ischild(struct prison *, struct prison *);
int prison_equal_ip4(struct prison *, struct prison *);
int prison_get_ip4(struct ucred *cred, struct in_addr *ia);
int prison_local_ip4(struct ucred *cred, struct in_addr *ia);
int prison_remote_ip4(struct ucred *cred, struct in_addr *ia);
int prison_check_ip4(struct ucred *cred, struct in_addr *ia);
int prison_saddrsel_ip4(struct ucred *, struct in_addr *);
#ifdef INET6
int prison_equal_ip6(struct prison *, struct prison *);
int prison_get_ip6(struct ucred *, struct in6_addr *);
int prison_local_ip6(struct ucred *, struct in6_addr *, int);
int prison_remote_ip6(struct ucred *, struct in6_addr *);
int prison_check_ip6(struct ucred *, struct in6_addr *);
int prison_saddrsel_ip6(struct ucred *, struct in6_addr *);
#endif
int prison_check_af(struct ucred *cred, int af);
int prison_if(struct ucred *cred, struct sockaddr *sa);
char *prison_name(struct prison *, struct prison *);
int prison_priv_check(struct ucred *cred, int priv);
int sysctl_jail_param(SYSCTL_HANDLER_ARGS);
void prison_racct_foreach(void (*callback)(struct racct *racct,
void *arg2, void *arg3), void *arg2, void *arg3);
struct prison_racct *prison_racct_find(const char *name);
void prison_racct_hold(struct prison_racct *prr);
void prison_racct_free(struct prison_racct *prr);
#endif /* _KERNEL */
#endif /* !_SYS_JAIL_H_ */