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 (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2013 by Delphix. All rights reserved.
25 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
26 */
27
28#include <sys/zfs_context.h>
29
30#if defined(_KERNEL)
31#include <sys/systm.h>
32#include <sys/sunddi.h>
33#include <sys/ctype.h>
34#else
35#include <stdio.h>
36#include <unistd.h>
37#include <strings.h>
38#include <libnvpair.h>
39#include <ctype.h>
40#endif
41#include <sys/dsl_deleg.h>
42#include "zfs_prop.h"
43#include "zfs_deleg.h"
44#include "zfs_namecheck.h"
45
46zfs_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_RENAME},
57 {ZFS_DELEG_PERM_ROLLBACK},
58 {ZFS_DELEG_PERM_SNAPSHOT},
59 {ZFS_DELEG_PERM_SHARE},
60 {ZFS_DELEG_PERM_SEND},
61 {ZFS_DELEG_PERM_USERPROP},
62 {ZFS_DELEG_PERM_USERQUOTA},
63 {ZFS_DELEG_PERM_GROUPQUOTA},
64 {ZFS_DELEG_PERM_USERUSED},
65 {ZFS_DELEG_PERM_GROUPUSED},
66 {ZFS_DELEG_PERM_HOLD},
67 {ZFS_DELEG_PERM_RELEASE},
68 {NULL}
69};
70
71static int
72zfs_valid_permission_name(const char *perm)
73{
74 if (zfs_deleg_canonicalize_perm(perm))
75 return (0);
76
77 return (permset_namecheck(perm, NULL, NULL));
78}
79
80const char *
81zfs_deleg_canonicalize_perm(const char *perm)
82{
83 int i;
84 zfs_prop_t prop;
85
86 for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
87 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
88 return (perm);
89 }
90
91 prop = zfs_name_to_prop(perm);
92 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
93 return (zfs_prop_to_name(prop));
94 return (NULL);
95
96}
97
98static int
99zfs_validate_who(char *who)
100{
101 char *p;
102
103 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
104 return (-1);
105
106 switch (who[0]) {
107 case ZFS_DELEG_USER:
108 case ZFS_DELEG_GROUP:
109 case ZFS_DELEG_USER_SETS:
110 case ZFS_DELEG_GROUP_SETS:
111 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
112 return (-1);
113 for (p = &who[3]; *p; p++)
114 if (!isdigit(*p))
115 return (-1);
116 break;
117
118 case ZFS_DELEG_NAMED_SET:
119 case ZFS_DELEG_NAMED_SET_SETS:
120 if (who[1] != ZFS_DELEG_NA)
121 return (-1);
122 return (permset_namecheck(&who[3], NULL, NULL));
123
124 case ZFS_DELEG_CREATE:
125 case ZFS_DELEG_CREATE_SETS:
126 if (who[1] != ZFS_DELEG_NA)
127 return (-1);
128 if (who[3] != '\0')
129 return (-1);
130 break;
131
132 case ZFS_DELEG_EVERYONE:
133 case ZFS_DELEG_EVERYONE_SETS:
134 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
135 return (-1);
136 if (who[3] != '\0')
137 return (-1);
138 break;
139
140 default:
141 return (-1);
142 }
143
144 return (0);
145}
146
147int
148zfs_deleg_verify_nvlist(nvlist_t *nvp)
149{
150 nvpair_t *who, *perm_name;
151 nvlist_t *perms;
152 int error;
153
154 if (nvp == NULL)
155 return (-1);
156
157 who = nvlist_next_nvpair(nvp, NULL);
158 if (who == NULL)
159 return (-1);
160
161 do {
162 if (zfs_validate_who(nvpair_name(who)))
163 return (-1);
164
165 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
166
167 if (error && error != ENOENT)
168 return (-1);
169 if (error == ENOENT)
170 continue;
171
172 perm_name = nvlist_next_nvpair(perms, NULL);
173 if (perm_name == NULL) {
174 return (-1);
175 }
176 do {
177 error = zfs_valid_permission_name(
178 nvpair_name(perm_name));
179 if (error)
180 return (-1);
181 } while ((perm_name = nvlist_next_nvpair(perms, perm_name))
182 != NULL);
183 } while ((who = nvlist_next_nvpair(nvp, who)) != NULL);
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 */
201void
202zfs_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}
235