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 /*
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 * Copyright 2011 Joyent Inc. All rights reserved.
26 */
27
28 #include "lint.h"
29 #include <sys/types.h>
30 #include <sys/syscall.h>
31 #include <sys/zone.h>
32 #include <sys/priv.h>
33 #include <priv_private.h>
34 #include <zone.h>
35 #include <sys/tsol/label.h>
36 #include <dlfcn.h>
37 #include <stdlib.h>
38 #include <errno.h>
39
40 zoneid_t
41 zone_create(const char *name, const char *root, const struct priv_set *privs,
42 const char *rctls, size_t rctlsz, const char *zfs, size_t zfssz,
43 int *extended_error, int match, int doi, const bslabel_t *label, int flags,
44 zoneid_t zone_did)
45 {
46 zone_def zd;
47 priv_data_t *d;
48
49 LOADPRIVDATA(d);
50
51 zd.zone_name = name;
52 zd.zone_root = root;
53 zd.zone_privs = privs;
54 zd.zone_privssz = d->pd_setsize;
55 zd.rctlbuf = rctls;
56 zd.rctlbufsz = rctlsz;
57 zd.zfsbuf = zfs;
58 zd.zfsbufsz = zfssz;
59 zd.extended_error = extended_error;
60 zd.match = match;
61 zd.doi = doi;
62 zd.label = label;
63 zd.flags = flags;
64 zd.zone_did = zone_did;
65
66 return ((zoneid_t)syscall(SYS_zone, ZONE_CREATE, &zd));
67 }
68
69 int
70 zone_boot(zoneid_t zoneid)
71 {
72 return (syscall(SYS_zone, ZONE_BOOT, zoneid));
73 }
74
75 int
76 zone_shutdown(zoneid_t zoneid)
77 {
78 return (syscall(SYS_zone, ZONE_SHUTDOWN, zoneid));
79 }
80
81 int
82 zone_destroy(zoneid_t zoneid)
83 {
84 return (syscall(SYS_zone, ZONE_DESTROY, zoneid));
85 }
86
87 ssize_t
88 zone_getattr(zoneid_t zoneid, int attr, void *valp, size_t size)
89 {
90 sysret_t rval;
91 int error;
92
93 error = __systemcall(&rval, SYS_zone, ZONE_GETATTR, zoneid,
94 attr, valp, size);
95 if (error)
96 (void) __set_errno(error);
97 return ((ssize_t)rval.sys_rval1);
98 }
99
100 int
101 zone_setattr(zoneid_t zoneid, int attr, void *valp, size_t size)
102 {
103 return (syscall(SYS_zone, ZONE_SETATTR, zoneid, attr, valp, size));
104 }
105
106 int
107 zone_enter(zoneid_t zoneid)
108 {
109 return (syscall(SYS_zone, ZONE_ENTER, zoneid));
110 }
111
112 /*
113 * Get id (if any) for specified zone.
114 *
115 * Call the real zone_get_id() in libzonecfg.so.1 if it can be found.
116 * Otherwise, perform a stripped-down version of the function.
117 * Any changes in one version should probably be reflected in the other.
118 *
119 * This stripped-down version of the function only checks for active
120 * (booted) zones, by numeric id or name.
121 */
122
123 typedef int (*zone_get_id_t)(const char *, zoneid_t *);
124 static zone_get_id_t real_zone_get_id = NULL;
125
126 int
127 zone_get_id(const char *str, zoneid_t *zip)
128 {
129 zoneid_t zoneid;
130 char *cp;
131
132 /*
133 * The first time we are called, attempt to dlopen() libzonecfg.so.1
134 * and get a pointer to the real zone_get_id().
135 * If we fail, set our pointer to -1 so we won't try again.
136 */
137 if (real_zone_get_id == NULL) {
138 /*
139 * There's no harm in doing this more than once, even
140 * concurrently. We will get the same result each time,
141 * and the dynamic linker will single-thread the dlopen()
142 * with its own internal lock. The worst that can happen
143 * is that the handle gets a reference count greater than
144 * one, which doesn't matter since we never dlclose()
145 * the handle if we successfully find the symbol; the
146 * library just stays in the address space until exit().
147 */
148 void *dlhandle = dlopen("libzonecfg.so.1", RTLD_LAZY);
149 void *sym = (void *)(-1);
150
151 if (dlhandle != NULL &&
152 (sym = dlsym(dlhandle, "zone_get_id")) == NULL) {
153 sym = (void *)(-1);
154 (void) dlclose(dlhandle);
155 }
156 real_zone_get_id = (zone_get_id_t)sym;
157 }
158
159 /*
160 * If we've successfully loaded it, call the real zone_get_id().
161 * Otherwise, perform our stripped-down version of the code.
162 */
163 if (real_zone_get_id != (zone_get_id_t)(-1))
164 return (real_zone_get_id(str, zip));
165
166 /* first try looking for active zone by id */
167 errno = 0;
168 zoneid = (zoneid_t)strtol(str, &cp, 0);
169 if (errno == 0 && cp != str && *cp == '\0' &&
170 getzonenamebyid(zoneid, NULL, 0) != -1) {
171 *zip = zoneid;
172 return (0);
173 }
174
175 /* then look for active zone by name */
176 if ((zoneid = getzoneidbyname(str)) != -1) {
177 *zip = zoneid;
178 return (0);
179 }
180
181 /* not an active zone, return error */
182 return (-1);
183 }
184
185 int
186 zone_list(zoneid_t *zonelist, uint_t *numzones)
187 {
188 return (syscall(SYS_zone, ZONE_LIST, zonelist, numzones));
189 }
190
191 /*
192 * Underlying implementation for getzoneid and getzoneidbyname.
193 */
194 static zoneid_t
195 zone_lookup(const char *name)
196 {
197 return ((zoneid_t)syscall(SYS_zone, ZONE_LOOKUP, name));
198 }
199
200 zoneid_t
201 getzoneid(void)
202 {
203 return (zone_lookup(NULL));
204 }
205
206 zoneid_t
207 getzoneidbyname(const char *zonename)
208 {
209 return (zone_lookup(zonename));
210 }
211
212 ssize_t
213 getzonenamebyid(zoneid_t zoneid, char *buf, size_t buflen)
214 {
215 return (zone_getattr(zoneid, ZONE_ATTR_NAME, buf, buflen));
216 }
217
218 int
219 zone_version(int *version)
220 {
221 return (syscall(SYS_zone, ZONE_VERSION, version));
222 }
223
224 int
225 zone_add_datalink(zoneid_t zoneid, datalink_id_t linkid)
226 {
227 return (syscall(SYS_zone, ZONE_ADD_DATALINK, zoneid, linkid));
228 }
229
230 int
231 zone_remove_datalink(zoneid_t zoneid, datalink_id_t linkid)
232 {
233 return (syscall(SYS_zone, ZONE_DEL_DATALINK, zoneid, linkid));
234 }
235
236 int
237 zone_check_datalink(zoneid_t *zoneidp, datalink_id_t linkid)
238 {
239 return (syscall(SYS_zone, ZONE_CHECK_DATALINK, zoneidp, linkid));
240 }
241
242 int
243 zone_list_datalink(zoneid_t zoneid, int *dlnump, datalink_id_t *linkids)
244 {
245 return (syscall(SYS_zone, ZONE_LIST_DATALINK, zoneid, dlnump, linkids));
246 }