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 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_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 71 static int 72 zfs_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 80 const char * 81 zfs_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 98 static int 99 zfs_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 } 146 147 int 148 zfs_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 */ 201 void 202 zfs_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