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