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 "thr_uberdata.h"
30 #include <sys/types.h>
31 #include <sys/syscall.h>
32 #include <sys/zone.h>
33 #include <sys/priv.h>
34 #include <priv_private.h>
35 #include <zone.h>
36 #include <sys/tsol/label.h>
37 #include <dlfcn.h>
38 #include <stdlib.h>
39 #include <errno.h>
40
41 zoneid_t
42 zone_create(const char *name, const char *root, const struct priv_set *privs,
43 const char *rctls, size_t rctlsz, const char *zfs, size_t zfssz,
44 int *extended_error, int match, int doi, const bslabel_t *label, int flags,
45 zoneid_t req_zoneid)
46 {
47 zone_def zd;
48 priv_data_t *d;
49
50 LOADPRIVDATA(d);
51
52 zd.zone_name = name;
53 zd.zone_root = root;
54 zd.zone_privs = privs;
55 zd.zone_privssz = d->pd_setsize;
56 zd.rctlbuf = rctls;
57 zd.rctlbufsz = rctlsz;
58 zd.zfsbuf = zfs;
59 zd.zfsbufsz = zfssz;
60 zd.extended_error = extended_error;
61 zd.match = match;
62 zd.doi = doi;
63 zd.label = label;
64 zd.flags = flags;
65 zd.zoneid = req_zoneid;
66
67 return ((zoneid_t)syscall(SYS_zone, ZONE_CREATE, &zd));
68 }
69
70 int
71 zone_boot(zoneid_t zoneid)
72 {
73 return (syscall(SYS_zone, ZONE_BOOT, zoneid));
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_setattr(zoneid_t zoneid, int attr, void *valp, size_t size)
103 {
104 return (syscall(SYS_zone, ZONE_SETATTR, zoneid, attr, valp, size));
105 }
106
107 int
108 zone_enter(zoneid_t zoneid)
109 {
110 return (syscall(SYS_zone, ZONE_ENTER, zoneid));
111 }
112
113 /*
114 * Get id (if any) for specified zone.
115 *
116 * Call the real zone_get_id() in libzonecfg.so.1 if it can be found.
117 * Otherwise, perform a stripped-down version of the function.
118 * Any changes in one version should probably be reflected in the other.
119 *
120 * This stripped-down version of the function only checks for active
121 * (booted) zones, by numeric id or name.
122 */
123
124 typedef int (*zone_get_id_t)(const char *, zoneid_t *);
125 static zone_get_id_t real_zone_get_id = NULL;
126
127 int
128 zone_get_id(const char *str, zoneid_t *zip)
129 {
130 zoneid_t zoneid;
131 char *cp;
132
133 /*
134 * The first time we are called, attempt to dlopen() libzonecfg.so.1
135 * and get a pointer to the real zone_get_id().
136 * If we fail, set our pointer to -1 so we won't try again.
137 */
138 if (real_zone_get_id == NULL) {
139 /*
140 * There's no harm in doing this more than once, even
141 * concurrently. We will get the same result each time,
142 * and the dynamic linker will single-thread the dlopen()
143 * with its own internal lock. The worst that can happen
144 * is that the handle gets a reference count greater than
145 * one, which doesn't matter since we never dlclose()
146 * the handle if we successfully find the symbol; the
147 * library just stays in the address space until exit().
148 */
149 void *dlhandle = dlopen("libzonecfg.so.1", RTLD_LAZY);
150 void *sym = (void *)(-1);
151
152 if (dlhandle != NULL &&
153 (sym = dlsym(dlhandle, "zone_get_id")) == NULL) {
154 sym = (void *)(-1);
155 (void) dlclose(dlhandle);
156 }
157 real_zone_get_id = (zone_get_id_t)sym;
158 }
159
160 /*
161 * If we've successfully loaded it, call the real zone_get_id().
162 * Otherwise, perform our stripped-down version of the code.
163 */
164 if (real_zone_get_id != (zone_get_id_t)(-1))
165 return (real_zone_get_id(str, zip));
166
167 /* first try looking for active zone by id */
168 errno = 0;
169 zoneid = (zoneid_t)strtol(str, &cp, 0);
170 if (errno == 0 && cp != str && *cp == '\0' &&
171 getzonenamebyid(zoneid, NULL, 0) != -1) {
172 *zip = zoneid;
173 return (0);
174 }
175
176 /* then look for active zone by name */
177 if ((zoneid = getzoneidbyname(str)) != -1) {
178 *zip = zoneid;
179 return (0);
180 }
181
182 /* not an active zone, return error */
183 return (-1);
184 }
185
186 int
187 zone_list(zoneid_t *zonelist, uint_t *numzones)
188 {
189 return (syscall(SYS_zone, ZONE_LIST, zonelist, numzones));
190 }
191
192 /*
193 * Underlying implementation for getzoneid and getzoneidbyname.
194 */
195 static zoneid_t
196 zone_lookup(const char *name)
197 {
198 return ((zoneid_t)syscall(SYS_zone, ZONE_LOOKUP, name));
199 }
200
201 zoneid_t
202 getzoneid(void)
203 {
204 return (zone_lookup(NULL));
205 }
206
207 zoneid_t
208 getzoneidbyname(const char *zonename)
209 {
210 return (zone_lookup(zonename));
211 }
212
213 ssize_t
214 getzonenamebyid(zoneid_t zoneid, char *buf, size_t buflen)
215 {
216 return (zone_getattr(zoneid, ZONE_ATTR_NAME, buf, buflen));
217 }
218
219 int
220 zone_version(int *version)
221 {
222 return (syscall(SYS_zone, ZONE_VERSION, version));
223 }
224
225 int
226 zone_add_datalink(zoneid_t zoneid, datalink_id_t linkid)
227 {
228 return (syscall(SYS_zone, ZONE_ADD_DATALINK, zoneid, linkid));
229 }
230
231 int
232 zone_remove_datalink(zoneid_t zoneid, datalink_id_t linkid)
233 {
234 return (syscall(SYS_zone, ZONE_DEL_DATALINK, zoneid, linkid));
235 }
236
237 int
238 zone_check_datalink(zoneid_t *zoneidp, datalink_id_t linkid)
239 {
240 return (syscall(SYS_zone, ZONE_CHECK_DATALINK, zoneidp, linkid));
241 }
242
243 int
244 zone_list_datalink(zoneid_t zoneid, int *dlnump, datalink_id_t *linkids)
245 {
246 return (syscall(SYS_zone, ZONE_LIST_DATALINK, zoneid, dlnump, linkids));
247 }
248
249 const char *
250 zone_get_nroot()
251 {
252 uberdata_t *udp = curthread->ul_uberdata;
253 return (udp->ub_broot);
254 }