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