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, 2015 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/sunddi.h> 32 #include <sys/ctype.h> 33 #else 34 #include <stdio.h> 35 #include <unistd.h> 36 #include <libnvpair.h> 37 #include <ctype.h> 38 #endif 39 #include <sys/strings.h> 40 #include <sys/dsl_deleg.h> 41 #include "zfs_prop.h" 42 #include "zfs_deleg.h" 43 #include "zfs_namecheck.h" 44 45 zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = { 46 {ZFS_DELEG_PERM_ALLOW}, 47 {ZFS_DELEG_PERM_BOOKMARK}, 48 {ZFS_DELEG_PERM_CLONE}, 49 {ZFS_DELEG_PERM_CREATE}, 50 {ZFS_DELEG_PERM_DESTROY}, 51 {ZFS_DELEG_PERM_DIFF}, 52 {ZFS_DELEG_PERM_MOUNT}, 53 {ZFS_DELEG_PERM_PROMOTE}, 54 {ZFS_DELEG_PERM_RECEIVE}, 55 {ZFS_DELEG_PERM_RENAME}, 56 {ZFS_DELEG_PERM_ROLLBACK}, 57 {ZFS_DELEG_PERM_SNAPSHOT}, 58 {ZFS_DELEG_PERM_SHARE}, 59 {ZFS_DELEG_PERM_SEND}, 60 {ZFS_DELEG_PERM_USERPROP}, 61 {ZFS_DELEG_PERM_USERQUOTA}, 62 {ZFS_DELEG_PERM_GROUPQUOTA}, 63 {ZFS_DELEG_PERM_USERUSED}, 64 {ZFS_DELEG_PERM_GROUPUSED}, 65 {ZFS_DELEG_PERM_USEROBJQUOTA}, 66 {ZFS_DELEG_PERM_GROUPOBJQUOTA}, 67 {ZFS_DELEG_PERM_USEROBJUSED}, 68 {ZFS_DELEG_PERM_GROUPOBJUSED}, 69 {ZFS_DELEG_PERM_HOLD}, 70 {ZFS_DELEG_PERM_RELEASE}, 71 {ZFS_DELEG_PERM_LOAD_KEY}, 72 {ZFS_DELEG_PERM_CHANGE_KEY}, 73 {ZFS_DELEG_PERM_PROJECTUSED}, 74 {ZFS_DELEG_PERM_PROJECTQUOTA}, 75 {ZFS_DELEG_PERM_PROJECTOBJUSED}, 76 {ZFS_DELEG_PERM_PROJECTOBJQUOTA}, 77 {NULL} 78 }; 79 80 static int 81 zfs_valid_permission_name(const char *perm) 82 { 83 if (zfs_deleg_canonicalize_perm(perm)) 84 return (0); 85 86 return (permset_namecheck(perm, NULL, NULL)); 87 } 88 89 const char * 90 zfs_deleg_canonicalize_perm(const char *perm) 91 { 92 int i; 93 zfs_prop_t prop; 94 95 for (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 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 108 zfs_validate_who(char *who) 109 { 110 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 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 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