The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/jail.h

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    1 /*
    2  * ----------------------------------------------------------------------------
    3  * "THE BEER-WARE LICENSE" (Revision 42):
    4  * <phk@FreeBSD.org> wrote this file.  As long as you retain this notice you
    5  * can do whatever you want with this stuff. If we meet some day, and you think
    6  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
    7  * ----------------------------------------------------------------------------
    8  *
    9  * $FreeBSD: releng/5.0/sys/sys/jail.h 96090 2002-05-06 03:13:08Z bde $
   10  *
   11  */
   12 
   13 #ifndef _SYS_JAIL_H_
   14 #define _SYS_JAIL_H_
   15 
   16 struct jail {
   17         u_int32_t       version;
   18         char            *path;
   19         char            *hostname;
   20         u_int32_t       ip_number;
   21 };
   22 
   23 #ifndef _KERNEL
   24 
   25 int jail(struct jail *);
   26 
   27 #else /* _KERNEL */
   28 
   29 #include <sys/queue.h>
   30 #include <sys/_lock.h>
   31 #include <sys/_mutex.h>
   32 
   33 #ifdef MALLOC_DECLARE
   34 MALLOC_DECLARE(M_PRISON);
   35 #endif
   36 
   37 /*
   38  * This structure describes a prison.  It is pointed to by all struct
   39  * ucreds's of the inmates.  pr_ref keeps track of them and is used to
   40  * delete the struture when the last inmate is dead.
   41  *
   42  * Lock key:
   43  *   (p) locked by pr_mutex
   44  *   (c) set only during creation before the structure is shared, no mutex
   45  *       required to read
   46  */
   47 struct mtx;
   48 struct prison {
   49         int              pr_ref;                        /* (p) refcount */
   50         char             pr_host[MAXHOSTNAMELEN];       /* (p) jail hostname */
   51         u_int32_t        pr_ip;                         /* (c) ip addr host */
   52         void            *pr_linux;                      /* (p) linux abi */
   53         int              pr_securelevel;                /* (p) securelevel */
   54         struct mtx       pr_mtx;
   55 };
   56 
   57 /*
   58  * Sysctl-set variables that determine global jail policy
   59  *
   60  * XXX MIB entries will need to be protected by a mutex.
   61  */
   62 extern int      jail_set_hostname_allowed;
   63 extern int      jail_socket_unixiproute_only;
   64 extern int      jail_sysvipc_allowed;
   65 
   66 /*
   67  * Kernel support functions for jail().
   68  */
   69 struct ucred;
   70 struct sockaddr;
   71 int jailed(struct ucred *cred);
   72 void getcredhostname(struct ucred *cred, char *, size_t);
   73 int prison_check(struct ucred *cred1, struct ucred *cred2);
   74 void prison_free(struct prison *pr);
   75 u_int32_t prison_getip(struct ucred *cred);
   76 void prison_hold(struct prison *pr);
   77 int prison_if(struct ucred *cred, struct sockaddr *sa);
   78 int prison_ip(struct ucred *cred, int flag, u_int32_t *ip);
   79 void prison_remote_ip(struct ucred *cred, int flags, u_int32_t *ip);
   80 
   81 #endif /* !_KERNEL */
   82 #endif /* !_SYS_JAIL_H_ */

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