xref: /illumos-gate/usr/src/lib/libc/port/sys/zone.c (revision 2b24ab6b)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
545916cd2Sjpk  * Common Development and Distribution License (the "License").
645916cd2Sjpk  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
217257d1b4Sraf 
227c478bd9Sstevel@tonic-gate /*
23*2b24ab6bSSebastien Roy  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277257d1b4Sraf #include "lint.h"
287c478bd9Sstevel@tonic-gate #include <sys/types.h>
297c478bd9Sstevel@tonic-gate #include <sys/syscall.h>
307c478bd9Sstevel@tonic-gate #include <sys/zone.h>
317c478bd9Sstevel@tonic-gate #include <sys/priv.h>
32821c4a97Sdp #include <priv_private.h>
337c478bd9Sstevel@tonic-gate #include <zone.h>
3445916cd2Sjpk #include <sys/tsol/label.h>
357c478bd9Sstevel@tonic-gate #include <dlfcn.h>
367c478bd9Sstevel@tonic-gate #include <stdlib.h>
377c478bd9Sstevel@tonic-gate #include <errno.h>
387c478bd9Sstevel@tonic-gate 
3945916cd2Sjpk zoneid_t
zone_create(const char * name,const char * root,const struct priv_set * privs,const char * rctls,size_t rctlsz,const char * zfs,size_t zfssz,int * extended_error,int match,int doi,const bslabel_t * label,int flags)40fa9e4066Sahrens zone_create(const char *name, const char *root, const struct priv_set *privs,
41fa9e4066Sahrens     const char *rctls, size_t rctlsz, const char *zfs, size_t zfssz,
42f4b3ec61Sdh     int *extended_error, int match, int doi, const bslabel_t *label, int flags)
437c478bd9Sstevel@tonic-gate {
447c478bd9Sstevel@tonic-gate 	zone_def  zd;
45821c4a97Sdp 	priv_data_t *d;
46821c4a97Sdp 
47821c4a97Sdp 	LOADPRIVDATA(d);
487c478bd9Sstevel@tonic-gate 
497c478bd9Sstevel@tonic-gate 	zd.zone_name = name;
507c478bd9Sstevel@tonic-gate 	zd.zone_root = root;
517c478bd9Sstevel@tonic-gate 	zd.zone_privs = privs;
52821c4a97Sdp 	zd.zone_privssz = d->pd_setsize;
537c478bd9Sstevel@tonic-gate 	zd.rctlbuf = rctls;
547c478bd9Sstevel@tonic-gate 	zd.rctlbufsz = rctlsz;
55fa9e4066Sahrens 	zd.zfsbuf = zfs;
56fa9e4066Sahrens 	zd.zfsbufsz = zfssz;
577c478bd9Sstevel@tonic-gate 	zd.extended_error = extended_error;
5845916cd2Sjpk 	zd.match = match;
5945916cd2Sjpk 	zd.doi = doi;
6045916cd2Sjpk 	zd.label = label;
61f4b3ec61Sdh 	zd.flags = flags;
627c478bd9Sstevel@tonic-gate 
63fa9e4066Sahrens 	return ((zoneid_t)syscall(SYS_zone, ZONE_CREATE, &zd));
647c478bd9Sstevel@tonic-gate }
657c478bd9Sstevel@tonic-gate 
667c478bd9Sstevel@tonic-gate int
zone_boot(zoneid_t zoneid)673f2f09c1Sdp zone_boot(zoneid_t zoneid)
687c478bd9Sstevel@tonic-gate {
693f2f09c1Sdp 	return (syscall(SYS_zone, ZONE_BOOT, zoneid));
707c478bd9Sstevel@tonic-gate }
717c478bd9Sstevel@tonic-gate 
727c478bd9Sstevel@tonic-gate int
zone_shutdown(zoneid_t zoneid)737c478bd9Sstevel@tonic-gate zone_shutdown(zoneid_t zoneid)
747c478bd9Sstevel@tonic-gate {
757c478bd9Sstevel@tonic-gate 	return (syscall(SYS_zone, ZONE_SHUTDOWN, zoneid));
767c478bd9Sstevel@tonic-gate }
777c478bd9Sstevel@tonic-gate 
787c478bd9Sstevel@tonic-gate int
zone_destroy(zoneid_t zoneid)797c478bd9Sstevel@tonic-gate zone_destroy(zoneid_t zoneid)
807c478bd9Sstevel@tonic-gate {
817c478bd9Sstevel@tonic-gate 	return (syscall(SYS_zone, ZONE_DESTROY, zoneid));
827c478bd9Sstevel@tonic-gate }
837c478bd9Sstevel@tonic-gate 
847c478bd9Sstevel@tonic-gate ssize_t
zone_getattr(zoneid_t zoneid,int attr,void * valp,size_t size)857c478bd9Sstevel@tonic-gate zone_getattr(zoneid_t zoneid, int attr, void *valp, size_t size)
867c478bd9Sstevel@tonic-gate {
877c478bd9Sstevel@tonic-gate 	sysret_t rval;
887c478bd9Sstevel@tonic-gate 	int error;
897c478bd9Sstevel@tonic-gate 
907c478bd9Sstevel@tonic-gate 	error = __systemcall(&rval, SYS_zone, ZONE_GETATTR, zoneid,
917c478bd9Sstevel@tonic-gate 	    attr, valp, size);
927c478bd9Sstevel@tonic-gate 	if (error)
937c478bd9Sstevel@tonic-gate 		(void) __set_errno(error);
947c478bd9Sstevel@tonic-gate 	return ((ssize_t)rval.sys_rval1);
957c478bd9Sstevel@tonic-gate }
967c478bd9Sstevel@tonic-gate 
973f2f09c1Sdp int
zone_setattr(zoneid_t zoneid,int attr,void * valp,size_t size)983f2f09c1Sdp zone_setattr(zoneid_t zoneid, int attr, void *valp, size_t size)
993f2f09c1Sdp {
1003f2f09c1Sdp 	return (syscall(SYS_zone, ZONE_SETATTR, zoneid, attr, valp, size));
1013f2f09c1Sdp }
1023f2f09c1Sdp 
1037c478bd9Sstevel@tonic-gate int
zone_enter(zoneid_t zoneid)1047c478bd9Sstevel@tonic-gate zone_enter(zoneid_t zoneid)
1057c478bd9Sstevel@tonic-gate {
1067c478bd9Sstevel@tonic-gate 	return (syscall(SYS_zone, ZONE_ENTER, zoneid));
1077c478bd9Sstevel@tonic-gate }
1087c478bd9Sstevel@tonic-gate 
1097c478bd9Sstevel@tonic-gate /*
1107c478bd9Sstevel@tonic-gate  * Get id (if any) for specified zone.
1117c478bd9Sstevel@tonic-gate  *
1127c478bd9Sstevel@tonic-gate  * Call the real zone_get_id() in libzonecfg.so.1 if it can be found.
1137c478bd9Sstevel@tonic-gate  * Otherwise, perform a stripped-down version of the function.
1147c478bd9Sstevel@tonic-gate  * Any changes in one version should probably be reflected in the other.
1157c478bd9Sstevel@tonic-gate  *
1167c478bd9Sstevel@tonic-gate  * This stripped-down version of the function only checks for active
1177c478bd9Sstevel@tonic-gate  * (booted) zones, by numeric id or name.
1187c478bd9Sstevel@tonic-gate  */
1197c478bd9Sstevel@tonic-gate 
1207c478bd9Sstevel@tonic-gate typedef	int (*zone_get_id_t)(const char *, zoneid_t *);
1217c478bd9Sstevel@tonic-gate static zone_get_id_t real_zone_get_id = NULL;
1227c478bd9Sstevel@tonic-gate 
1237c478bd9Sstevel@tonic-gate int
zone_get_id(const char * str,zoneid_t * zip)1247c478bd9Sstevel@tonic-gate zone_get_id(const char *str, zoneid_t *zip)
1257c478bd9Sstevel@tonic-gate {
1267c478bd9Sstevel@tonic-gate 	zoneid_t zoneid;
1277c478bd9Sstevel@tonic-gate 	char *cp;
1287c478bd9Sstevel@tonic-gate 
1297c478bd9Sstevel@tonic-gate 	/*
1307c478bd9Sstevel@tonic-gate 	 * The first time we are called, attempt to dlopen() libzonecfg.so.1
1317c478bd9Sstevel@tonic-gate 	 * and get a pointer to the real zone_get_id().
1327c478bd9Sstevel@tonic-gate 	 * If we fail, set our pointer to -1 so we won't try again.
1337c478bd9Sstevel@tonic-gate 	 */
1347c478bd9Sstevel@tonic-gate 	if (real_zone_get_id == NULL) {
1357c478bd9Sstevel@tonic-gate 		/*
1367c478bd9Sstevel@tonic-gate 		 * There's no harm in doing this more than once, even
1377c478bd9Sstevel@tonic-gate 		 * concurrently.  We will get the same result each time,
1387c478bd9Sstevel@tonic-gate 		 * and the dynamic linker will single-thread the dlopen()
1397c478bd9Sstevel@tonic-gate 		 * with its own internal lock.  The worst that can happen
1407c478bd9Sstevel@tonic-gate 		 * is that the handle gets a reference count greater than
1417c478bd9Sstevel@tonic-gate 		 * one, which doesn't matter since we never dlclose()
1427c478bd9Sstevel@tonic-gate 		 * the handle if we successfully find the symbol; the
1437c478bd9Sstevel@tonic-gate 		 * library just stays in the address space until exit().
1447c478bd9Sstevel@tonic-gate 		 */
1457c478bd9Sstevel@tonic-gate 		void *dlhandle = dlopen("libzonecfg.so.1", RTLD_LAZY);
1467c478bd9Sstevel@tonic-gate 		void *sym = (void *)(-1);
1477c478bd9Sstevel@tonic-gate 
1487c478bd9Sstevel@tonic-gate 		if (dlhandle != NULL &&
1497c478bd9Sstevel@tonic-gate 		    (sym = dlsym(dlhandle, "zone_get_id")) == NULL) {
1507c478bd9Sstevel@tonic-gate 			sym = (void *)(-1);
1517c478bd9Sstevel@tonic-gate 			(void) dlclose(dlhandle);
1527c478bd9Sstevel@tonic-gate 		}
1537c478bd9Sstevel@tonic-gate 		real_zone_get_id = (zone_get_id_t)sym;
1547c478bd9Sstevel@tonic-gate 	}
1557c478bd9Sstevel@tonic-gate 
1567c478bd9Sstevel@tonic-gate 	/*
1577c478bd9Sstevel@tonic-gate 	 * If we've successfully loaded it, call the real zone_get_id().
1587c478bd9Sstevel@tonic-gate 	 * Otherwise, perform our stripped-down version of the code.
1597c478bd9Sstevel@tonic-gate 	 */
1607c478bd9Sstevel@tonic-gate 	if (real_zone_get_id != (zone_get_id_t)(-1))
1617c478bd9Sstevel@tonic-gate 		return (real_zone_get_id(str, zip));
1627c478bd9Sstevel@tonic-gate 
1637c478bd9Sstevel@tonic-gate 	/* first try looking for active zone by id */
1647c478bd9Sstevel@tonic-gate 	errno = 0;
1657c478bd9Sstevel@tonic-gate 	zoneid = (zoneid_t)strtol(str, &cp, 0);
1667c478bd9Sstevel@tonic-gate 	if (errno == 0 && cp != str && *cp == '\0' &&
1677c478bd9Sstevel@tonic-gate 	    getzonenamebyid(zoneid, NULL, 0) != -1) {
1687c478bd9Sstevel@tonic-gate 		*zip = zoneid;
1697c478bd9Sstevel@tonic-gate 		return (0);
1707c478bd9Sstevel@tonic-gate 	}
1717c478bd9Sstevel@tonic-gate 
1727c478bd9Sstevel@tonic-gate 	/* then look for active zone by name */
1737c478bd9Sstevel@tonic-gate 	if ((zoneid = getzoneidbyname(str)) != -1) {
1747c478bd9Sstevel@tonic-gate 		*zip = zoneid;
1757c478bd9Sstevel@tonic-gate 		return (0);
1767c478bd9Sstevel@tonic-gate 	}
1777c478bd9Sstevel@tonic-gate 
1787c478bd9Sstevel@tonic-gate 	/* not an active zone, return error */
1797c478bd9Sstevel@tonic-gate 	return (-1);
1807c478bd9Sstevel@tonic-gate }
1817c478bd9Sstevel@tonic-gate 
1827c478bd9Sstevel@tonic-gate int
zone_list(zoneid_t * zonelist,uint_t * numzones)1837c478bd9Sstevel@tonic-gate zone_list(zoneid_t *zonelist, uint_t *numzones)
1847c478bd9Sstevel@tonic-gate {
1857c478bd9Sstevel@tonic-gate 	return (syscall(SYS_zone, ZONE_LIST, zonelist, numzones));
1867c478bd9Sstevel@tonic-gate }
1877c478bd9Sstevel@tonic-gate 
1887c478bd9Sstevel@tonic-gate /*
1897c478bd9Sstevel@tonic-gate  * Underlying implementation for getzoneid and getzoneidbyname.
1907c478bd9Sstevel@tonic-gate  */
1917c478bd9Sstevel@tonic-gate static zoneid_t
zone_lookup(const char * name)1927c478bd9Sstevel@tonic-gate zone_lookup(const char *name)
1937c478bd9Sstevel@tonic-gate {
1947c478bd9Sstevel@tonic-gate 	return ((zoneid_t)syscall(SYS_zone, ZONE_LOOKUP, name));
1957c478bd9Sstevel@tonic-gate }
1967c478bd9Sstevel@tonic-gate 
1977c478bd9Sstevel@tonic-gate zoneid_t
getzoneid(void)1987c478bd9Sstevel@tonic-gate getzoneid(void)
1997c478bd9Sstevel@tonic-gate {
2007c478bd9Sstevel@tonic-gate 	return (zone_lookup(NULL));
2017c478bd9Sstevel@tonic-gate }
2027c478bd9Sstevel@tonic-gate 
2037c478bd9Sstevel@tonic-gate zoneid_t
getzoneidbyname(const char * zonename)2047c478bd9Sstevel@tonic-gate getzoneidbyname(const char *zonename)
2057c478bd9Sstevel@tonic-gate {
2067c478bd9Sstevel@tonic-gate 	return (zone_lookup(zonename));
2077c478bd9Sstevel@tonic-gate }
2087c478bd9Sstevel@tonic-gate 
2097c478bd9Sstevel@tonic-gate ssize_t
getzonenamebyid(zoneid_t zoneid,char * buf,size_t buflen)2107c478bd9Sstevel@tonic-gate getzonenamebyid(zoneid_t zoneid, char *buf, size_t buflen)
2117c478bd9Sstevel@tonic-gate {
2127c478bd9Sstevel@tonic-gate 	return (zone_getattr(zoneid, ZONE_ATTR_NAME, buf, buflen));
2137c478bd9Sstevel@tonic-gate }
214821c4a97Sdp 
215821c4a97Sdp int
zone_version(int * version)216821c4a97Sdp zone_version(int *version)
217821c4a97Sdp {
218821c4a97Sdp 	return (syscall(SYS_zone, ZONE_VERSION, version));
219821c4a97Sdp }
220f4b3ec61Sdh 
221f4b3ec61Sdh int
zone_add_datalink(zoneid_t zoneid,datalink_id_t linkid)222*2b24ab6bSSebastien Roy zone_add_datalink(zoneid_t zoneid, datalink_id_t linkid)
223f4b3ec61Sdh {
224*2b24ab6bSSebastien Roy 	return (syscall(SYS_zone, ZONE_ADD_DATALINK, zoneid, linkid));
225f4b3ec61Sdh }
226f4b3ec61Sdh 
227f4b3ec61Sdh int
zone_remove_datalink(zoneid_t zoneid,datalink_id_t linkid)228*2b24ab6bSSebastien Roy zone_remove_datalink(zoneid_t zoneid, datalink_id_t linkid)
229f4b3ec61Sdh {
230*2b24ab6bSSebastien Roy 	return (syscall(SYS_zone, ZONE_DEL_DATALINK, zoneid, linkid));
231f4b3ec61Sdh }
232f4b3ec61Sdh 
233f4b3ec61Sdh int
zone_check_datalink(zoneid_t * zoneidp,datalink_id_t linkid)234*2b24ab6bSSebastien Roy zone_check_datalink(zoneid_t *zoneidp, datalink_id_t linkid)
235f4b3ec61Sdh {
236*2b24ab6bSSebastien Roy 	return (syscall(SYS_zone, ZONE_CHECK_DATALINK, zoneidp, linkid));
237f4b3ec61Sdh }
238f4b3ec61Sdh 
239f4b3ec61Sdh int
zone_list_datalink(zoneid_t zoneid,int * dlnump,datalink_id_t * linkids)240*2b24ab6bSSebastien Roy zone_list_datalink(zoneid_t zoneid, int *dlnump, datalink_id_t *linkids)
241f4b3ec61Sdh {
242*2b24ab6bSSebastien Roy 	return (syscall(SYS_zone, ZONE_LIST_DATALINK, zoneid, dlnump, linkids));
243f4b3ec61Sdh }
244