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 */
26
27 #include "lint.h"
28 #include "thr_uberdata.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 {
45 zone_def zd;
46 priv_data_t *d;
47
48 LOADPRIVDATA(d);
49
50 zd.zone_name = name;
51 zd.zone_root = root;
52 zd.zone_privs = privs;
53 zd.zone_privssz = d->pd_setsize;
54 zd.rctlbuf = rctls;
55 zd.rctlbufsz = rctlsz;
56 zd.zfsbuf = zfs;
57 zd.zfsbufsz = zfssz;
58 zd.extended_error = extended_error;
59 zd.match = match;
60 zd.doi = doi;
61 zd.label = label;
62 zd.flags = flags;
63
64 return ((zoneid_t)syscall(SYS_zone, ZONE_CREATE, &zd));
65 }
66
67 int
68 zone_boot(zoneid_t zoneid)
69 {
70 return (syscall(SYS_zone, ZONE_BOOT, zoneid));
71 }
72
73 int
74 zone_shutdown(zoneid_t zoneid)
75 {
76 return (syscall(SYS_zone, ZONE_SHUTDOWN, zoneid));
77 }
78
79 int
80 zone_destroy(zoneid_t zoneid)
81 {
82 return (syscall(SYS_zone, ZONE_DESTROY, zoneid));
83 }
84
85 ssize_t
86 zone_getattr(zoneid_t zoneid, int attr, void *valp, size_t size)
87 {
88 sysret_t rval;
89 int error;
90
91 error = __systemcall(&rval, SYS_zone, ZONE_GETATTR, zoneid,
92 attr, valp, size);
93 if (error)
94 (void) __set_errno(error);
95 return ((ssize_t)rval.sys_rval1);
96 }
97
98 int
99 zone_setattr(zoneid_t zoneid, int attr, void *valp, size_t size)
100 {
101 return (syscall(SYS_zone, ZONE_SETATTR, zoneid, attr, valp, size));
102 }
103
104 int
105 zone_enter(zoneid_t zoneid)
106 {
107 return (syscall(SYS_zone, ZONE_ENTER, zoneid));
108 }
109
110 /*
111 * Get id (if any) for specified zone.
112 *
113 * Call the real zone_get_id() in libzonecfg.so.1 if it can be found.
114 * Otherwise, perform a stripped-down version of the function.
115 * Any changes in one version should probably be reflected in the other.
116 *
117 * This stripped-down version of the function only checks for active
118 * (booted) zones, by numeric id or name.
119 */
120
121 typedef int (*zone_get_id_t)(const char *, zoneid_t *);
122 static zone_get_id_t real_zone_get_id = NULL;
123
124 int
125 zone_get_id(const char *str, zoneid_t *zip)
126 {
127 zoneid_t zoneid;
128 char *cp;
129
130 /*
131 * The first time we are called, attempt to dlopen() libzonecfg.so.1
132 * and get a pointer to the real zone_get_id().
133 * If we fail, set our pointer to -1 so we won't try again.
134 */
135 if (real_zone_get_id == NULL) {
136 /*
137 * There's no harm in doing this more than once, even
138 * concurrently. We will get the same result each time,
139 * and the dynamic linker will single-thread the dlopen()
140 * with its own internal lock. The worst that can happen
141 * is that the handle gets a reference count greater than
142 * one, which doesn't matter since we never dlclose()
143 * the handle if we successfully find the symbol; the
144 * library just stays in the address space until exit().
145 */
146 void *dlhandle = dlopen("libzonecfg.so.1", RTLD_LAZY);
147 void *sym = (void *)(-1);
148
149 if (dlhandle != NULL &&
150 (sym = dlsym(dlhandle, "zone_get_id")) == NULL) {
151 sym = (void *)(-1);
152 (void) dlclose(dlhandle);
153 }
154 real_zone_get_id = (zone_get_id_t)sym;
155 }
156
157 /*
158 * If we've successfully loaded it, call the real zone_get_id().
159 * Otherwise, perform our stripped-down version of the code.
160 */
161 if (real_zone_get_id != (zone_get_id_t)(-1))
162 return (real_zone_get_id(str, zip));
163
164 /* first try looking for active zone by id */
165 errno = 0;
166 zoneid = (zoneid_t)strtol(str, &cp, 0);
167 if (errno == 0 && cp != str && *cp == '\0' &&
168 getzonenamebyid(zoneid, NULL, 0) != -1) {
169 *zip = zoneid;
170 return (0);
171 }
172
173 /* then look for active zone by name */
174 if ((zoneid = getzoneidbyname(str)) != -1) {
175 *zip = zoneid;
176 return (0);
177 }
178
179 /* not an active zone, return error */
180 return (-1);
181 }
182
183 int
184 zone_list(zoneid_t *zonelist, uint_t *numzones)
185 {
186 return (syscall(SYS_zone, ZONE_LIST, zonelist, numzones));
187 }
188
189 /*
190 * Underlying implementation for getzoneid and getzoneidbyname.
191 */
192 static zoneid_t
193 zone_lookup(const char *name)
194 {
195 return ((zoneid_t)syscall(SYS_zone, ZONE_LOOKUP, name));
196 }
197
198 zoneid_t
199 getzoneid(void)
200 {
201 return (zone_lookup(NULL));
202 }
203
204 zoneid_t
205 getzoneidbyname(const char *zonename)
206 {
207 return (zone_lookup(zonename));
208 }
209
210 ssize_t
211 getzonenamebyid(zoneid_t zoneid, char *buf, size_t buflen)
212 {
213 return (zone_getattr(zoneid, ZONE_ATTR_NAME, buf, buflen));
214 }
215
216 int
217 zone_version(int *version)
218 {
219 return (syscall(SYS_zone, ZONE_VERSION, version));
220 }
221
222 int
223 zone_add_datalink(zoneid_t zoneid, datalink_id_t linkid)
224 {
225 return (syscall(SYS_zone, ZONE_ADD_DATALINK, zoneid, linkid));
226 }
227
228 int
229 zone_remove_datalink(zoneid_t zoneid, datalink_id_t linkid)
230 {
231 return (syscall(SYS_zone, ZONE_DEL_DATALINK, zoneid, linkid));
232 }
233
234 int
235 zone_check_datalink(zoneid_t *zoneidp, datalink_id_t linkid)
236 {
237 return (syscall(SYS_zone, ZONE_CHECK_DATALINK, zoneidp, linkid));
238 }
239
240 int
241 zone_list_datalink(zoneid_t zoneid, int *dlnump, datalink_id_t *linkids)
242 {
243 return (syscall(SYS_zone, ZONE_LIST_DATALINK, zoneid, dlnump, linkids));
244 }
245
246 const char *
247 zone_get_nroot()
248 {
249 uberdata_t *udp = curthread->ul_uberdata;
250 return (udp->ub_broot);
251 }