1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or https://opensource.org/licenses/CDDL-1.0.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
25 * Copyright (c) 2013, 2015 by Delphix. All rights reserved.
26 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
27 */
28
29 #include <sys/zfs_context.h>
30
31 #if defined(_KERNEL)
32 #include <sys/sunddi.h>
33 #include <sys/ctype.h>
34 #else
35 #include <stdio.h>
36 #include <unistd.h>
37 #include <libnvpair.h>
38 #include <ctype.h>
39 #endif
40 #include <sys/string.h>
41 #include <sys/dsl_deleg.h>
42 #include "zfs_prop.h"
43 #include "zfs_deleg.h"
44 #include "zfs_namecheck.h"
45
46 const zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
47 {ZFS_DELEG_PERM_ALLOW},
48 {ZFS_DELEG_PERM_BOOKMARK},
49 {ZFS_DELEG_PERM_CLONE},
50 {ZFS_DELEG_PERM_CREATE},
51 {ZFS_DELEG_PERM_DESTROY},
52 {ZFS_DELEG_PERM_DIFF},
53 {ZFS_DELEG_PERM_MOUNT},
54 {ZFS_DELEG_PERM_PROMOTE},
55 {ZFS_DELEG_PERM_RECEIVE},
56 {ZFS_DELEG_PERM_RECEIVE_APPEND},
57 {ZFS_DELEG_PERM_RENAME},
58 {ZFS_DELEG_PERM_ROLLBACK},
59 {ZFS_DELEG_PERM_SNAPSHOT},
60 {ZFS_DELEG_PERM_SHARE},
61 {ZFS_DELEG_PERM_SEND},
62 {ZFS_DELEG_PERM_SEND_RAW},
63 {ZFS_DELEG_PERM_USERPROP},
64 {ZFS_DELEG_PERM_USERQUOTA},
65 {ZFS_DELEG_PERM_GROUPQUOTA},
66 {ZFS_DELEG_PERM_USERUSED},
67 {ZFS_DELEG_PERM_GROUPUSED},
68 {ZFS_DELEG_PERM_USEROBJQUOTA},
69 {ZFS_DELEG_PERM_GROUPOBJQUOTA},
70 {ZFS_DELEG_PERM_USEROBJUSED},
71 {ZFS_DELEG_PERM_GROUPOBJUSED},
72 {ZFS_DELEG_PERM_HOLD},
73 {ZFS_DELEG_PERM_RELEASE},
74 {ZFS_DELEG_PERM_LOAD_KEY},
75 {ZFS_DELEG_PERM_CHANGE_KEY},
76 {ZFS_DELEG_PERM_PROJECTUSED},
77 {ZFS_DELEG_PERM_PROJECTQUOTA},
78 {ZFS_DELEG_PERM_PROJECTOBJUSED},
79 {ZFS_DELEG_PERM_PROJECTOBJQUOTA},
80 {NULL}
81 };
82
83 static int
zfs_valid_permission_name(const char * perm)84 zfs_valid_permission_name(const char *perm)
85 {
86 if (zfs_deleg_canonicalize_perm(perm))
87 return (0);
88
89 return (permset_namecheck(perm, NULL, NULL));
90 }
91
92 const char *
zfs_deleg_canonicalize_perm(const char * perm)93 zfs_deleg_canonicalize_perm(const char *perm)
94 {
95 for (int i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
96 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
97 return (perm);
98 }
99
100 zfs_prop_t prop = zfs_name_to_prop(perm);
101 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
102 return (zfs_prop_to_name(prop));
103 return (NULL);
104
105 }
106
107 static int
zfs_validate_who(const char * who)108 zfs_validate_who(const char *who)
109 {
110 const char *p;
111
112 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
113 return (-1);
114
115 switch (who[0]) {
116 case ZFS_DELEG_USER:
117 case ZFS_DELEG_GROUP:
118 case ZFS_DELEG_USER_SETS:
119 case ZFS_DELEG_GROUP_SETS:
120 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
121 return (-1);
122 for (p = &who[3]; *p; p++)
123 if (!isdigit(*p))
124 return (-1);
125 break;
126
127 case ZFS_DELEG_NAMED_SET:
128 case ZFS_DELEG_NAMED_SET_SETS:
129 if (who[1] != ZFS_DELEG_NA)
130 return (-1);
131 return (permset_namecheck(&who[3], NULL, NULL));
132
133 case ZFS_DELEG_CREATE:
134 case ZFS_DELEG_CREATE_SETS:
135 if (who[1] != ZFS_DELEG_NA)
136 return (-1);
137 if (who[3] != '\0')
138 return (-1);
139 break;
140
141 case ZFS_DELEG_EVERYONE:
142 case ZFS_DELEG_EVERYONE_SETS:
143 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
144 return (-1);
145 if (who[3] != '\0')
146 return (-1);
147 break;
148
149 default:
150 return (-1);
151 }
152
153 return (0);
154 }
155
156 int
zfs_deleg_verify_nvlist(nvlist_t * nvp)157 zfs_deleg_verify_nvlist(nvlist_t *nvp)
158 {
159 nvpair_t *who, *perm_name;
160 nvlist_t *perms;
161 int error;
162
163 if (nvp == NULL)
164 return (-1);
165
166 who = nvlist_next_nvpair(nvp, NULL);
167 if (who == NULL)
168 return (-1);
169
170 do {
171 if (zfs_validate_who(nvpair_name(who)))
172 return (-1);
173
174 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
175
176 if (error && error != ENOENT)
177 return (-1);
178 if (error == ENOENT)
179 continue;
180
181 perm_name = nvlist_next_nvpair(perms, NULL);
182 if (perm_name == NULL) {
183 return (-1);
184 }
185 do {
186 error = zfs_valid_permission_name(
187 nvpair_name(perm_name));
188 if (error)
189 return (-1);
190 } while ((perm_name = nvlist_next_nvpair(perms, perm_name))
191 != NULL);
192 } while ((who = nvlist_next_nvpair(nvp, who)) != NULL);
193 return (0);
194 }
195
196 /*
197 * Construct the base attribute name. The base attribute names
198 * are the "key" to locate the jump objects which contain the actual
199 * permissions. The base attribute names are encoded based on
200 * type of entry and whether it is a local or descendent permission.
201 *
202 * Arguments:
203 * attr - attribute name return string, attribute is assumed to be
204 * ZFS_MAX_DELEG_NAME long.
205 * type - type of entry to construct
206 * inheritchr - inheritance type (local,descendent, or NA for create and
207 * permission set definitions
208 * data - is either a permission set name or a 64 bit uid/gid.
209 */
210 void
zfs_deleg_whokey(char * attr,zfs_deleg_who_type_t type,char inheritchr,void * data)211 zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
212 char inheritchr, void *data)
213 {
214 int len = ZFS_MAX_DELEG_NAME;
215 uint64_t *id = data;
216
217 switch (type) {
218 case ZFS_DELEG_USER:
219 case ZFS_DELEG_GROUP:
220 case ZFS_DELEG_USER_SETS:
221 case ZFS_DELEG_GROUP_SETS:
222 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
223 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
224 break;
225 case ZFS_DELEG_NAMED_SET_SETS:
226 case ZFS_DELEG_NAMED_SET:
227 (void) snprintf(attr, len, "%c-%c%s", type,
228 ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
229 break;
230 case ZFS_DELEG_CREATE:
231 case ZFS_DELEG_CREATE_SETS:
232 (void) snprintf(attr, len, "%c-%c", type,
233 ZFS_DELEG_FIELD_SEP_CHR);
234 break;
235 case ZFS_DELEG_EVERYONE:
236 case ZFS_DELEG_EVERYONE_SETS:
237 (void) snprintf(attr, len, "%c%c%c", type, inheritchr,
238 ZFS_DELEG_FIELD_SEP_CHR);
239 break;
240 default:
241 ASSERT(!"bad zfs_deleg_who_type_t");
242 }
243 }
244
245 #if defined(_KERNEL)
246 EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
247 EXPORT_SYMBOL(zfs_deleg_whokey);
248 EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
249 #endif
250