1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #pragma weak getzoneid = _getzoneid 29 #pragma weak getzoneidbyname = _getzoneidbyname 30 #pragma weak getzonenamebyid = _getzonenamebyid 31 32 #include "synonyms.h" 33 #include <sys/types.h> 34 #include <sys/syscall.h> 35 #include <sys/zone.h> 36 #include <sys/priv.h> 37 #include <priv_private.h> 38 #include <zone.h> 39 #include <sys/tsol/label.h> 40 #include <dlfcn.h> 41 #include <stdlib.h> 42 #include <errno.h> 43 44 zoneid_t 45 zone_create(const char *name, const char *root, const struct priv_set *privs, 46 const char *rctls, size_t rctlsz, const char *zfs, size_t zfssz, 47 int *extended_error, int match, int doi, const bslabel_t *label) 48 { 49 zone_def zd; 50 priv_data_t *d; 51 52 LOADPRIVDATA(d); 53 54 zd.zone_name = name; 55 zd.zone_root = root; 56 zd.zone_privs = privs; 57 zd.zone_privssz = d->pd_setsize; 58 zd.rctlbuf = rctls; 59 zd.rctlbufsz = rctlsz; 60 zd.zfsbuf = zfs; 61 zd.zfsbufsz = zfssz; 62 zd.extended_error = extended_error; 63 zd.match = match; 64 zd.doi = doi; 65 zd.label = label; 66 67 return ((zoneid_t)syscall(SYS_zone, ZONE_CREATE, &zd)); 68 } 69 70 int 71 zone_boot(zoneid_t zoneid, const char *bootargs) 72 { 73 return (syscall(SYS_zone, ZONE_BOOT, zoneid, bootargs)); 74 } 75 76 int 77 zone_shutdown(zoneid_t zoneid) 78 { 79 return (syscall(SYS_zone, ZONE_SHUTDOWN, zoneid)); 80 } 81 82 int 83 zone_destroy(zoneid_t zoneid) 84 { 85 return (syscall(SYS_zone, ZONE_DESTROY, zoneid)); 86 } 87 88 ssize_t 89 zone_getattr(zoneid_t zoneid, int attr, void *valp, size_t size) 90 { 91 sysret_t rval; 92 int error; 93 94 error = __systemcall(&rval, SYS_zone, ZONE_GETATTR, zoneid, 95 attr, valp, size); 96 if (error) 97 (void) __set_errno(error); 98 return ((ssize_t)rval.sys_rval1); 99 } 100 101 int 102 zone_enter(zoneid_t zoneid) 103 { 104 return (syscall(SYS_zone, ZONE_ENTER, zoneid)); 105 } 106 107 /* 108 * Get id (if any) for specified zone. 109 * 110 * Call the real zone_get_id() in libzonecfg.so.1 if it can be found. 111 * Otherwise, perform a stripped-down version of the function. 112 * Any changes in one version should probably be reflected in the other. 113 * 114 * This stripped-down version of the function only checks for active 115 * (booted) zones, by numeric id or name. 116 */ 117 118 typedef int (*zone_get_id_t)(const char *, zoneid_t *); 119 static zone_get_id_t real_zone_get_id = NULL; 120 121 int 122 zone_get_id(const char *str, zoneid_t *zip) 123 { 124 zoneid_t zoneid; 125 char *cp; 126 127 /* 128 * The first time we are called, attempt to dlopen() libzonecfg.so.1 129 * and get a pointer to the real zone_get_id(). 130 * If we fail, set our pointer to -1 so we won't try again. 131 */ 132 if (real_zone_get_id == NULL) { 133 /* 134 * There's no harm in doing this more than once, even 135 * concurrently. We will get the same result each time, 136 * and the dynamic linker will single-thread the dlopen() 137 * with its own internal lock. The worst that can happen 138 * is that the handle gets a reference count greater than 139 * one, which doesn't matter since we never dlclose() 140 * the handle if we successfully find the symbol; the 141 * library just stays in the address space until exit(). 142 */ 143 void *dlhandle = dlopen("libzonecfg.so.1", RTLD_LAZY); 144 void *sym = (void *)(-1); 145 146 if (dlhandle != NULL && 147 (sym = dlsym(dlhandle, "zone_get_id")) == NULL) { 148 sym = (void *)(-1); 149 (void) dlclose(dlhandle); 150 } 151 real_zone_get_id = (zone_get_id_t)sym; 152 } 153 154 /* 155 * If we've successfully loaded it, call the real zone_get_id(). 156 * Otherwise, perform our stripped-down version of the code. 157 */ 158 if (real_zone_get_id != (zone_get_id_t)(-1)) 159 return (real_zone_get_id(str, zip)); 160 161 /* first try looking for active zone by id */ 162 errno = 0; 163 zoneid = (zoneid_t)strtol(str, &cp, 0); 164 if (errno == 0 && cp != str && *cp == '\0' && 165 getzonenamebyid(zoneid, NULL, 0) != -1) { 166 *zip = zoneid; 167 return (0); 168 } 169 170 /* then look for active zone by name */ 171 if ((zoneid = getzoneidbyname(str)) != -1) { 172 *zip = zoneid; 173 return (0); 174 } 175 176 /* not an active zone, return error */ 177 return (-1); 178 } 179 180 int 181 zone_list(zoneid_t *zonelist, uint_t *numzones) 182 { 183 return (syscall(SYS_zone, ZONE_LIST, zonelist, numzones)); 184 } 185 186 /* 187 * Underlying implementation for getzoneid and getzoneidbyname. 188 */ 189 static zoneid_t 190 zone_lookup(const char *name) 191 { 192 return ((zoneid_t)syscall(SYS_zone, ZONE_LOOKUP, name)); 193 } 194 195 zoneid_t 196 getzoneid(void) 197 { 198 return (zone_lookup(NULL)); 199 } 200 201 zoneid_t 202 getzoneidbyname(const char *zonename) 203 { 204 return (zone_lookup(zonename)); 205 } 206 207 ssize_t 208 getzonenamebyid(zoneid_t zoneid, char *buf, size_t buflen) 209 { 210 return (zone_getattr(zoneid, ZONE_ATTR_NAME, buf, buflen)); 211 } 212 213 int 214 zone_version(int *version) 215 { 216 return (syscall(SYS_zone, ZONE_VERSION, version)); 217 } 218