zone.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_ZONE_H
#define _SYS_ZONE_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/mutex.h>
#include <sys/param.h>
#include <sys/rctl.h>
#include <sys/pset.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* NOTE
*
* The contents of this file are private to the implementation of
* Solaris and are subject to change at any time without notice.
* Applications and drivers using these interfaces may fail to
* run on future releases.
*/
/* Available both in kernel and for user space */
/* zone id restrictions and special ids */
#define MAX_ZONEID 9999
#define MIN_USERZONEID 1 /* lowest user-creatable zone ID */
#define MIN_ZONEID 0 /* minimum zone ID on system */
#define GLOBAL_ZONEID 0
#define ZONEID_WIDTH 4 /* for printf */
/* system call subcodes */
#define ZONE_CREATE 0
#define ZONE_DESTROY 1
#define ZONE_GETATTR 2
#define ZONE_ENTER 3
#define ZONE_LIST 4
#define ZONE_SHUTDOWN 5
#define ZONE_LOOKUP 6
#define ZONE_BOOT 7
/* zone attributes */
#define ZONE_ATTR_ROOT 1
#define ZONE_ATTR_NAME 2
#define ZONE_ATTR_STATUS 3
#define ZONE_ATTR_PRIVSET 4
#define ZONE_ATTR_UNIQID 5
#define ZONE_ATTR_POOLID 6
#define ZONE_ATTR_INITPID 7
#ifdef _SYSCALL32
typedef struct {
caddr32_t zone_name;
caddr32_t zone_root;
caddr32_t zone_privs;
caddr32_t rctlbuf;
size32_t rctlbufsz;
caddr32_t extended_error;
} zone_def32;
#endif
typedef struct {
const char *zone_name;
const char *zone_root;
const struct priv_set *zone_privs;
const char *rctlbuf;
size_t rctlbufsz;
int *extended_error;
} zone_def;
/* extended error information */
#define ZE_UNKNOWN 0 /* No extended error info */
#define ZE_CHROOTED 1 /* tried to zone_create from chroot */
#define ZE_AREMOUNTS 2 /* there are mounts within the zone */
/* zone_status */
typedef enum {
ZONE_IS_UNINITIALIZED = 0,
ZONE_IS_READY,
ZONE_IS_BOOTING,
ZONE_IS_RUNNING,
ZONE_IS_SHUTTING_DOWN,
ZONE_IS_EMPTY,
ZONE_IS_DOWN,
ZONE_IS_DYING,
ZONE_IS_DEAD
} zone_status_t;
#define ZONE_MIN_STATE ZONE_IS_UNINITIALIZED
#define ZONE_MAX_STATE ZONE_IS_DEAD
/*
* Valid commands which may be issued by zoneadm to zoneadmd. The kernel also
* communicates with zoneadmd, but only uses Z_REBOOT and Z_HALT.
*/
typedef enum zone_cmd {
Z_READY, Z_BOOT, Z_REBOOT, Z_HALT, Z_NOTE_UNINSTALLING
} zone_cmd_t;
#define ZONEBOOTARGS_MAX 257 /* uadmin()'s buffer is 257 bytes. */
/*
* The structure of a request to zoneadmd.
*/
typedef struct zone_cmd_arg {
uint64_t uniqid; /* unique "generation number" */
zone_cmd_t cmd; /* requested action */
char locale[MAXPATHLEN]; /* locale in which to render messages */
char bootbuf[ZONEBOOTARGS_MAX]; /* arguments passed to zone_boot() */
} zone_cmd_arg_t;
/*
* Structure of zoneadmd's response to a request. A NULL return value means
* the caller should attempt to restart zoneadmd and retry.
*/
typedef struct zone_cmd_rval {
int rval; /* return value of request */
char errbuf[1]; /* variable-sized buffer containing error messages */
} zone_cmd_rval_t;
/*
* The zone support infrastructure uses the zone name as a component
* of unix domain (AF_UNIX) sockets, which are limited to 108 characters
* in length, so ZONENAME_MAX is limited by that.
*/
#define ZONENAME_MAX 64
#define GLOBAL_ZONENAME "global"
/*
* Extended Regular expression (see regex(5)) which matches all valid zone
* names.
*/
#define ZONENAME_REGEXP "[a-zA-Z0-9][-_.a-zA-Z0-9]{0,62}"
/*
* Where the zones support infrastructure places temporary files.
*/
#define ZONES_TMPDIR "/var/run/zones"
/*
* The path to the door used by clients to communicate with zoneadmd.
*/
#define ZONE_DOOR_PATH ZONES_TMPDIR "/%s.zoneadmd_door"
#ifdef _KERNEL
/*
* We need to protect the definition of 'list_t' from userland applications and
* libraries which may be defining ther own versions.
*/
#include <sys/list.h>
#define GLOBAL_ZONEUNIQID 0 /* uniqid of the global zone */
/* zone_flags */
#define ZF_DESTROYED 0x1 /* ZSD destructor callbacks run */
struct pool;
typedef struct zone {
/*
* zone_name is never modified once set.
*/
char *zone_name; /* zone's configuration name */
/*
* zone_nodename and zone_domain are never freed once allocated.
*/
char *zone_nodename; /* utsname.nodename equivalent */
char *zone_domain; /* srpc_domain equivalent */
/*
* zone_lock protects the following fields of a zone_t:
* zone_ref
* zone_cred_ref
* zone_ntasks
* zone_flags
* zone_zsd
*/
kmutex_t zone_lock;
/*
* zone_linkage is the zone's linkage into the active or
* death-row list. The field is protected by zonehash_lock.
*/
list_node_t zone_linkage;
zoneid_t zone_id; /* ID of zone */
uint_t zone_ref; /* count of zone_hold()s on zone */
uint_t zone_cred_ref; /* count of zone_hold_cred()s on zone */
/*
* zone_rootvp and zone_rootpath can never be modified once set.
*/
struct vnode *zone_rootvp; /* zone's root vnode */
char *zone_rootpath; /* Path to zone's root + '/' */
ushort_t zone_flags; /* misc flags */
zone_status_t zone_status; /* protected by zone_status_lock */
uint_t zone_ntasks; /* number of tasks executing in zone */
kmutex_t zone_nlwps_lock; /* protects zone_nlwps, and *_nlwps */
/* counters in projects and tasks */
/* that are within the zone */
rctl_qty_t zone_nlwps; /* number of lwps in zone */
rctl_qty_t zone_nlwps_ctl; /* protected by zone_rctls->rcs_lock */
uint_t zone_rootpathlen; /* strlen(zone_rootpath) + 1 */
uint32_t zone_shares; /* FSS shares allocated to zone */
rctl_set_t *zone_rctls; /* zone-wide (zone.*) rctls */
list_t zone_zsd; /* list of Zone-Specific Data values */
kcondvar_t zone_cv; /* used to signal state changes */
struct proc *zone_zsched; /* Dummy kernel "zsched" process */
pid_t zone_proc_initpid; /* pid of "init" for this zone */
int zone_boot_err; /* for zone_boot() if boot fails */
char *zone_bootargs; /* arguments passed via zone_boot() */
/*
* zone_kthreads is protected by zone_status_lock.
*/
kthread_t *zone_kthreads; /* kernel threads in zone */
struct priv_set *zone_privset; /* limit set for zone */
/*
* zone_vfslist is protected by vfs_list_lock().
*/
struct vfs *zone_vfslist; /* list of FS's mounted in zone */
uint64_t zone_uniqid; /* unique zone generation number */
struct cred *zone_kcred; /* kcred-like, zone-limited cred */
/*
* zone_pool is protected by pool_lock().
*/
struct pool *zone_pool; /* pool the zone is bound to */
hrtime_t zone_pool_mod; /* last pool bind modification time */
/* zone_psetid is protected by cpu_lock */
psetid_t zone_psetid; /* pset the zone is bound to */
/*
* The following two can be read without holding any locks. They are
* updated under cpu_lock.
*/
int zone_ncpus; /* zone's idea of ncpus */
int zone_ncpus_online; /* zone's idea of ncpus_online */
} zone_t;
/*
* Special value of zone_psetid to indicate that pools are disabled.
*/
#define ZONE_PS_INVAL PS_MYID
extern zone_t zone0;
extern zone_t *global_zone;
extern uint_t maxzones;
extern rctl_hndl_t rc_zone_nlwps;
extern const char * const zone_initname;
extern long zone(int, void *, void *, void *, void *, void *);
extern void zone_zsd_init(void);
extern void zone_init(void);
extern void zone_hold(zone_t *);
extern void zone_rele(zone_t *);
extern void zone_cred_hold(zone_t *);
extern void zone_cred_rele(zone_t *);
extern void zone_task_hold(zone_t *);
extern void zone_task_rele(zone_t *);
extern zone_t *zone_find_by_id(zoneid_t);
extern zone_t *zone_find_by_name(char *);
extern zone_t *zone_find_by_path(const char *);
extern zoneid_t getzoneid(void);
/*
* Zone-specific data (ZSD) APIs
*/
/*
* The following is what code should be initializing its zone_key_t to if it
* calls zone_getspecific() without necessarily knowing that zone_key_create()
* has been called on the key.
*/
#define ZONE_KEY_UNINITIALIZED 0
typedef uint_t zone_key_t;
extern void zone_key_create(zone_key_t *, void *(*)(zoneid_t),
void (*)(zoneid_t, void *), void (*)(zoneid_t, void *));
extern int zone_key_delete(zone_key_t);
extern void *zone_getspecific(zone_key_t, zone_t *);
extern int zone_setspecific(zone_key_t, zone_t *, const void *);
/*
* The definition of a zsd_entry is truly private to zone.c and is only
* placed here so it can be shared with mdb.
*/
struct zsd_entry {
zone_key_t zsd_key; /* Key used to lookup value */
void *zsd_data; /* Caller-managed value */
/*
* Callbacks to be executed when a zone is created, shutdown, and
* destroyed, respectively.
*/
void *(*zsd_create)(zoneid_t);
void (*zsd_shutdown)(zoneid_t, void *);
void (*zsd_destroy)(zoneid_t, void *);
list_node_t zsd_linkage;
};
/*
* Macros to help with zone visibility restrictions.
*/
/*
* Is process in the global zone?
*/
#define INGLOBALZONE(p) \
((p)->p_zone == global_zone)
/*
* Can process view objects in given zone?
*/
#define HASZONEACCESS(p, zoneid) \
((p)->p_zone->zone_id == (zoneid) || INGLOBALZONE(p))
/*
* Convenience macro to see if a resolved path is visible from within a
* given zone.
*
* The basic idea is that the first (zone_rootpathlen - 1) bytes of the
* two strings must be equal. Since the rootpathlen has a trailing '/',
* we want to skip everything in the path up to (but not including) the
* trailing '/'.
*/
#define ZONE_PATH_VISIBLE(path, zone) \
(strncmp((path), (zone)->zone_rootpath, \
(zone)->zone_rootpathlen - 1) == 0)
/*
* Convenience macro to go from the global view of a path to that seen
* from within said zone. It is the responsibility of the caller to
* ensure that the path is a resolved one (ie, no '..'s or '.'s), and is
* in fact visible from within the zone.
*/
#define ZONE_PATH_TRANSLATE(path, zone) \
(ASSERT(ZONE_PATH_VISIBLE(path, zone)), \
(path) + (zone)->zone_rootpathlen - 2)
/*
* Special processes visible in all zones.
*/
#define ZONE_SPECIALPID(x) ((x) == 0 || (x) == 1)
/*
* Special zoneid_t token to refer to all zones.
*/
#define ALL_ZONES (-1)
/*
* Zone-safe version of thread_create() to be used when the caller wants to
* create a kernel thread to run within the current zone's context.
*/
extern kthread_t *zthread_create(caddr_t, size_t, void (*)(), void *, size_t,
pri_t);
extern void zthread_exit(void);
/*
* Functions for an external observer to register interest in a zone's status
* change. Observers will be woken up when the zone status equals the status
* argument passed in (in the case of zone_status_timedwait, the function may
* also return because of a timeout; zone_status_wait_sig may return early due
* to a signal being delivered; zone_status_timedwait_sig may return for any of
* the above reasons).
*
* Otherwise these behave identically to cv_timedwait(), cv_wait(), and
* cv_wait_sig() respectively.
*/
extern clock_t zone_status_timedwait(zone_t *, clock_t, zone_status_t);
extern clock_t zone_status_timedwait_sig(zone_t *, clock_t, zone_status_t);
extern void zone_status_wait(zone_t *, zone_status_t);
extern int zone_status_wait_sig(zone_t *, zone_status_t);
/*
* Get the status of the zone (at the time it was called). The state may
* have progressed by the time it is returned.
*/
extern zone_status_t zone_status_get(zone_t *);
/*
* Get the "kcred" credentials corresponding to the given zone.
*/
extern struct cred *zone_get_kcred(zoneid_t);
/*
* Get/set the pool the zone is currently bound to.
*/
extern struct pool *zone_pool_get(zone_t *);
extern void zone_pool_set(zone_t *, struct pool *);
/*
* Get/set the pset the zone is currently using.
*/
extern psetid_t zone_pset_get(zone_t *);
extern void zone_pset_set(zone_t *, psetid_t);
/*
* Get the number of cpus/online-cpus visible from the given zone.
*/
extern int zone_ncpus_get(zone_t *);
extern int zone_ncpus_online_get(zone_t *);
/*
* zone version of uadmin()
*/
extern int zone_uadmin(int, int, struct cred *);
extern void zone_shutdown_global(void);
extern void mount_in_progress(void);
extern void mount_completed(void);
extern int zone_walk(int (*)(zone_t *, void *), void *);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_ZONE_H */