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 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #if defined(_KERNEL)
30 #include <sys/systm.h>
31 #include <sys/sunddi.h>
32 #include <sys/ctype.h>
33 #else
34 #include <stdio.h>
35 #include <unistd.h>
36 #include <strings.h>
37 #include <libnvpair.h>
38 #include <ctype.h>
39 #endif
40 /* XXX includes zfs_context.h, so why bother with the above? */
41 #include <sys/dsl_deleg.h>
42 #include "zfs_prop.h"
43 #include "zfs_deleg.h"
44 #include "zfs_namecheck.h"
45
46 /*
47 * permission table
48 *
49 * Keep this table in sorted order
50 *
51 * This table is used for displaying all permissions for
52 * zfs allow
53 */
54
55 zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
56 {ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW},
57 {ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
58 {ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
59 {ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
60 {ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
61 {ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
62 {ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
63 {ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
64 {ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
65 {ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
66 {ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
67 {ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_NONE },
68 {ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
69 {NULL, ZFS_DELEG_NOTE_NONE }
70 };
71
72 static int
73 zfs_valid_permission_name(const char *perm)
74 {
75 if (zfs_deleg_canonicalize_perm(perm))
76 return (0);
77
78 return (permset_namecheck(perm, NULL, NULL));
79 }
80
81 const char *
82 zfs_deleg_canonicalize_perm(const char *perm)
83 {
84 int i;
85 zfs_prop_t prop;
86
87 for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
88 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
89 return (perm);
90 }
91
92 prop = zfs_name_to_prop(perm);
93 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
94 return (zfs_prop_to_name(prop));
95 return (NULL);
96
97 }
98
99 static int
100 zfs_validate_who(char *who)
101 {
102 char *p;
103
104 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
105 return (-1);
106
107 switch (who[0]) {
108 case ZFS_DELEG_USER:
109 case ZFS_DELEG_GROUP:
110 case ZFS_DELEG_USER_SETS:
111 case ZFS_DELEG_GROUP_SETS:
112 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
113 return (-1);
114 for (p = &who[3]; *p; p++)
115 if (!isdigit(*p))
116 return (-1);
117 break;
118
119 case ZFS_DELEG_NAMED_SET:
120 case ZFS_DELEG_NAMED_SET_SETS:
121 if (who[1] != ZFS_DELEG_NA)
122 return (-1);
123 return (permset_namecheck(&who[3], NULL, NULL));
124
125 case ZFS_DELEG_CREATE:
126 case ZFS_DELEG_CREATE_SETS:
127 if (who[1] != ZFS_DELEG_NA)
128 return (-1);
129 if (who[3] != '\0')
130 return (-1);
131 break;
132
133 case ZFS_DELEG_EVERYONE:
134 case ZFS_DELEG_EVERYONE_SETS:
135 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
136 return (-1);
137 if (who[3] != '\0')
138 return (-1);
139 break;
140
141 default:
142 return (-1);
143 }
144
145 return (0);
146 }
147
148 int
149 zfs_deleg_verify_nvlist(nvlist_t *nvp)
150 {
151 nvpair_t *who, *perm_name;
152 nvlist_t *perms;
153 int error;
154
155 if (nvp == NULL)
156 return (-1);
157
158 who = nvlist_next_nvpair(nvp, NULL);
159 if (who == NULL)
160 return (-1);
161
162 do {
163 if (zfs_validate_who(nvpair_name(who)))
164 return (-1);
165
166 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
167
168 if (error && error != ENOENT)
169 return (-1);
170 if (error == ENOENT)
171 continue;
172
173 perm_name = nvlist_next_nvpair(perms, NULL);
174 if (perm_name == NULL) {
175 return (-1);
176 }
177 do {
178 error = zfs_valid_permission_name(
179 nvpair_name(perm_name));
180 if (error)
181 return (-1);
182 } while (perm_name = nvlist_next_nvpair(perms, perm_name));
183 } while (who = nvlist_next_nvpair(nvp, who));
184 return (0);
185 }
186
187 /*
188 * Construct the base attribute name. The base attribute names
189 * are the "key" to locate the jump objects which contain the actual
190 * permissions. The base attribute names are encoded based on
191 * type of entry and whether it is a local or descendent permission.
192 *
193 * Arguments:
194 * attr - attribute name return string, attribute is assumed to be
195 * ZFS_MAX_DELEG_NAME long.
196 * type - type of entry to construct
197 * inheritchr - inheritance type (local,descendent, or NA for create and
198 * permission set definitions
199 * data - is either a permission set name or a 64 bit uid/gid.
200 */
201 void
202 zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
203 char inheritchr, void *data)
204 {
205 int len = ZFS_MAX_DELEG_NAME;
206 uint64_t *id = data;
207
208 switch (type) {
209 case ZFS_DELEG_USER:
210 case ZFS_DELEG_GROUP:
211 case ZFS_DELEG_USER_SETS:
212 case ZFS_DELEG_GROUP_SETS:
213 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
214 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
215 break;
216 case ZFS_DELEG_NAMED_SET_SETS:
217 case ZFS_DELEG_NAMED_SET:
218 (void) snprintf(attr, len, "%c-%c%s", type,
219 ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
220 break;
221 case ZFS_DELEG_CREATE:
222 case ZFS_DELEG_CREATE_SETS:
223 (void) snprintf(attr, len, "%c-%c", type,
224 ZFS_DELEG_FIELD_SEP_CHR);
225 break;
226 case ZFS_DELEG_EVERYONE:
227 case ZFS_DELEG_EVERYONE_SETS:
228 (void) snprintf(attr, len, "%c%c%c", type, inheritchr,
229 ZFS_DELEG_FIELD_SEP_CHR);
230 break;
231 default:
232 ASSERT(!"bad zfs_deleg_who_type_t");
233 }
234 }