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_USERPROP},
63 {ZFS_DELEG_PERM_USERQUOTA},
64 {ZFS_DELEG_PERM_GROUPQUOTA},
65 {ZFS_DELEG_PERM_USERUSED},
66 {ZFS_DELEG_PERM_GROUPUSED},
67 {ZFS_DELEG_PERM_USEROBJQUOTA},
68 {ZFS_DELEG_PERM_GROUPOBJQUOTA},
69 {ZFS_DELEG_PERM_USEROBJUSED},
70 {ZFS_DELEG_PERM_GROUPOBJUSED},
71 {ZFS_DELEG_PERM_HOLD},
72 {ZFS_DELEG_PERM_RELEASE},
73 {ZFS_DELEG_PERM_LOAD_KEY},
74 {ZFS_DELEG_PERM_CHANGE_KEY},
75 {ZFS_DELEG_PERM_PROJECTUSED},
76 {ZFS_DELEG_PERM_PROJECTQUOTA},
77 {ZFS_DELEG_PERM_PROJECTOBJUSED},
78 {ZFS_DELEG_PERM_PROJECTOBJQUOTA},
79 {NULL}
80 };
81
82 static int
zfs_valid_permission_name(const char * perm)83 zfs_valid_permission_name(const char *perm)
84 {
85 if (zfs_deleg_canonicalize_perm(perm))
86 return (0);
87
88 return (permset_namecheck(perm, NULL, NULL));
89 }
90
91 const char *
zfs_deleg_canonicalize_perm(const char * perm)92 zfs_deleg_canonicalize_perm(const char *perm)
93 {
94 for (int i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
95 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
96 return (perm);
97 }
98
99 zfs_prop_t prop = zfs_name_to_prop(perm);
100 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
101 return (zfs_prop_to_name(prop));
102 return (NULL);
103
104 }
105
106 static int
zfs_validate_who(const char * who)107 zfs_validate_who(const char *who)
108 {
109 const char *p;
110
111 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
112 return (-1);
113
114 switch (who[0]) {
115 case ZFS_DELEG_USER:
116 case ZFS_DELEG_GROUP:
117 case ZFS_DELEG_USER_SETS:
118 case ZFS_DELEG_GROUP_SETS:
119 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
120 return (-1);
121 for (p = &who[3]; *p; p++)
122 if (!isdigit(*p))
123 return (-1);
124 break;
125
126 case ZFS_DELEG_NAMED_SET:
127 case ZFS_DELEG_NAMED_SET_SETS:
128 if (who[1] != ZFS_DELEG_NA)
129 return (-1);
130 return (permset_namecheck(&who[3], NULL, NULL));
131
132 case ZFS_DELEG_CREATE:
133 case ZFS_DELEG_CREATE_SETS:
134 if (who[1] != ZFS_DELEG_NA)
135 return (-1);
136 if (who[3] != '\0')
137 return (-1);
138 break;
139
140 case ZFS_DELEG_EVERYONE:
141 case ZFS_DELEG_EVERYONE_SETS:
142 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
143 return (-1);
144 if (who[3] != '\0')
145 return (-1);
146 break;
147
148 default:
149 return (-1);
150 }
151
152 return (0);
153 }
154
155 int
zfs_deleg_verify_nvlist(nvlist_t * nvp)156 zfs_deleg_verify_nvlist(nvlist_t *nvp)
157 {
158 nvpair_t *who, *perm_name;
159 nvlist_t *perms;
160 int error;
161
162 if (nvp == NULL)
163 return (-1);
164
165 who = nvlist_next_nvpair(nvp, NULL);
166 if (who == NULL)
167 return (-1);
168
169 do {
170 if (zfs_validate_who(nvpair_name(who)))
171 return (-1);
172
173 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
174
175 if (error && error != ENOENT)
176 return (-1);
177 if (error == ENOENT)
178 continue;
179
180 perm_name = nvlist_next_nvpair(perms, NULL);
181 if (perm_name == NULL) {
182 return (-1);
183 }
184 do {
185 error = zfs_valid_permission_name(
186 nvpair_name(perm_name));
187 if (error)
188 return (-1);
189 } while ((perm_name = nvlist_next_nvpair(perms, perm_name))
190 != NULL);
191 } while ((who = nvlist_next_nvpair(nvp, who)) != NULL);
192 return (0);
193 }
194
195 /*
196 * Construct the base attribute name. The base attribute names
197 * are the "key" to locate the jump objects which contain the actual
198 * permissions. The base attribute names are encoded based on
199 * type of entry and whether it is a local or descendent permission.
200 *
201 * Arguments:
202 * attr - attribute name return string, attribute is assumed to be
203 * ZFS_MAX_DELEG_NAME long.
204 * type - type of entry to construct
205 * inheritchr - inheritance type (local,descendent, or NA for create and
206 * permission set definitions
207 * data - is either a permission set name or a 64 bit uid/gid.
208 */
209 void
zfs_deleg_whokey(char * attr,zfs_deleg_who_type_t type,char inheritchr,void * data)210 zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
211 char inheritchr, void *data)
212 {
213 int len = ZFS_MAX_DELEG_NAME;
214 uint64_t *id = data;
215
216 switch (type) {
217 case ZFS_DELEG_USER:
218 case ZFS_DELEG_GROUP:
219 case ZFS_DELEG_USER_SETS:
220 case ZFS_DELEG_GROUP_SETS:
221 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
222 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
223 break;
224 case ZFS_DELEG_NAMED_SET_SETS:
225 case ZFS_DELEG_NAMED_SET:
226 (void) snprintf(attr, len, "%c-%c%s", type,
227 ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
228 break;
229 case ZFS_DELEG_CREATE:
230 case ZFS_DELEG_CREATE_SETS:
231 (void) snprintf(attr, len, "%c-%c", type,
232 ZFS_DELEG_FIELD_SEP_CHR);
233 break;
234 case ZFS_DELEG_EVERYONE:
235 case ZFS_DELEG_EVERYONE_SETS:
236 (void) snprintf(attr, len, "%c%c%c", type, inheritchr,
237 ZFS_DELEG_FIELD_SEP_CHR);
238 break;
239 default:
240 ASSERT(!"bad zfs_deleg_who_type_t");
241 }
242 }
243
244 #if defined(_KERNEL)
245 EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
246 EXPORT_SYMBOL(zfs_deleg_whokey);
247 EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
248 #endif
249