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/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 46 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_REMAP}, 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 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 * 92 zfs_deleg_canonicalize_perm(const char *perm) 93 { 94 int i; 95 zfs_prop_t prop; 96 97 for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) { 98 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0) 99 return (perm); 100 } 101 102 prop = zfs_name_to_prop(perm); 103 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop)) 104 return (zfs_prop_to_name(prop)); 105 return (NULL); 106 107 } 108 109 static int 110 zfs_validate_who(char *who) 111 { 112 char *p; 113 114 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR) 115 return (-1); 116 117 switch (who[0]) { 118 case ZFS_DELEG_USER: 119 case ZFS_DELEG_GROUP: 120 case ZFS_DELEG_USER_SETS: 121 case ZFS_DELEG_GROUP_SETS: 122 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 123 return (-1); 124 for (p = &who[3]; *p; p++) 125 if (!isdigit(*p)) 126 return (-1); 127 break; 128 129 case ZFS_DELEG_NAMED_SET: 130 case ZFS_DELEG_NAMED_SET_SETS: 131 if (who[1] != ZFS_DELEG_NA) 132 return (-1); 133 return (permset_namecheck(&who[3], NULL, NULL)); 134 135 case ZFS_DELEG_CREATE: 136 case ZFS_DELEG_CREATE_SETS: 137 if (who[1] != ZFS_DELEG_NA) 138 return (-1); 139 if (who[3] != '\0') 140 return (-1); 141 break; 142 143 case ZFS_DELEG_EVERYONE: 144 case ZFS_DELEG_EVERYONE_SETS: 145 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 146 return (-1); 147 if (who[3] != '\0') 148 return (-1); 149 break; 150 151 default: 152 return (-1); 153 } 154 155 return (0); 156 } 157 158 int 159 zfs_deleg_verify_nvlist(nvlist_t *nvp) 160 { 161 nvpair_t *who, *perm_name; 162 nvlist_t *perms; 163 int error; 164 165 if (nvp == NULL) 166 return (-1); 167 168 who = nvlist_next_nvpair(nvp, NULL); 169 if (who == NULL) 170 return (-1); 171 172 do { 173 if (zfs_validate_who(nvpair_name(who))) 174 return (-1); 175 176 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms); 177 178 if (error && error != ENOENT) 179 return (-1); 180 if (error == ENOENT) 181 continue; 182 183 perm_name = nvlist_next_nvpair(perms, NULL); 184 if (perm_name == NULL) { 185 return (-1); 186 } 187 do { 188 error = zfs_valid_permission_name( 189 nvpair_name(perm_name)); 190 if (error) 191 return (-1); 192 } while ((perm_name = nvlist_next_nvpair(perms, perm_name)) 193 != NULL); 194 } while ((who = nvlist_next_nvpair(nvp, who)) != NULL); 195 return (0); 196 } 197 198 /* 199 * Construct the base attribute name. The base attribute names 200 * are the "key" to locate the jump objects which contain the actual 201 * permissions. The base attribute names are encoded based on 202 * type of entry and whether it is a local or descendent permission. 203 * 204 * Arguments: 205 * attr - attribute name return string, attribute is assumed to be 206 * ZFS_MAX_DELEG_NAME long. 207 * type - type of entry to construct 208 * inheritchr - inheritance type (local,descendent, or NA for create and 209 * permission set definitions 210 * data - is either a permission set name or a 64 bit uid/gid. 211 */ 212 void 213 zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type, 214 char inheritchr, void *data) 215 { 216 int len = ZFS_MAX_DELEG_NAME; 217 uint64_t *id = data; 218 219 switch (type) { 220 case ZFS_DELEG_USER: 221 case ZFS_DELEG_GROUP: 222 case ZFS_DELEG_USER_SETS: 223 case ZFS_DELEG_GROUP_SETS: 224 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr, 225 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id); 226 break; 227 case ZFS_DELEG_NAMED_SET_SETS: 228 case ZFS_DELEG_NAMED_SET: 229 (void) snprintf(attr, len, "%c-%c%s", type, 230 ZFS_DELEG_FIELD_SEP_CHR, (char *)data); 231 break; 232 case ZFS_DELEG_CREATE: 233 case ZFS_DELEG_CREATE_SETS: 234 (void) snprintf(attr, len, "%c-%c", type, 235 ZFS_DELEG_FIELD_SEP_CHR); 236 break; 237 case ZFS_DELEG_EVERYONE: 238 case ZFS_DELEG_EVERYONE_SETS: 239 (void) snprintf(attr, len, "%c%c%c", type, inheritchr, 240 ZFS_DELEG_FIELD_SEP_CHR); 241 break; 242 default: 243 ASSERT(!"bad zfs_deleg_who_type_t"); 244 } 245 } 246