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 */ 25 26 #if defined(_KERNEL) 27 #include <sys/systm.h> 28 #include <sys/sunddi.h> 29 #include <sys/ctype.h> 30 #else 31 #include <stdio.h> 32 #include <unistd.h> 33 #include <strings.h> 34 #include <libnvpair.h> 35 #include <ctype.h> 36 #endif 37 /* XXX includes zfs_context.h, so why bother with the above? */ 38 #include <sys/dsl_deleg.h> 39 #include "zfs_prop.h" 40 #include "zfs_deleg.h" 41 #include "zfs_namecheck.h" 42 43 /* 44 * permission table 45 * 46 * Keep this table in sorted order 47 * 48 * This table is used for displaying all permissions for 49 * zfs allow 50 */ 51 52 zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = { 53 {ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW}, 54 {ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE }, 55 {ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE }, 56 {ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY }, 57 {ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT }, 58 {ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE }, 59 {ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE }, 60 {ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME }, 61 {ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK }, 62 {ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT }, 63 {ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE }, 64 {ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_SEND }, 65 {ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP }, 66 {ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA }, 67 {ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA }, 68 {ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED }, 69 {ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED }, 70 {ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD }, 71 {ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE }, 72 {ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF}, 73 {NULL, ZFS_DELEG_NOTE_NONE } 74 }; 75 76 static int 77 zfs_valid_permission_name(const char *perm) 78 { 79 if (zfs_deleg_canonicalize_perm(perm)) 80 return (0); 81 82 return (permset_namecheck(perm, NULL, NULL)); 83 } 84 85 const char * 86 zfs_deleg_canonicalize_perm(const char *perm) 87 { 88 int i; 89 zfs_prop_t prop; 90 91 for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) { 92 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0) 93 return (perm); 94 } 95 96 prop = zfs_name_to_prop(perm); 97 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop)) 98 return (zfs_prop_to_name(prop)); 99 return (NULL); 100 101 } 102 103 static int 104 zfs_validate_who(char *who) 105 { 106 char *p; 107 108 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR) 109 return (-1); 110 111 switch (who[0]) { 112 case ZFS_DELEG_USER: 113 case ZFS_DELEG_GROUP: 114 case ZFS_DELEG_USER_SETS: 115 case ZFS_DELEG_GROUP_SETS: 116 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 117 return (-1); 118 for (p = &who[3]; *p; p++) 119 if (!isdigit(*p)) 120 return (-1); 121 break; 122 123 case ZFS_DELEG_NAMED_SET: 124 case ZFS_DELEG_NAMED_SET_SETS: 125 if (who[1] != ZFS_DELEG_NA) 126 return (-1); 127 return (permset_namecheck(&who[3], NULL, NULL)); 128 129 case ZFS_DELEG_CREATE: 130 case ZFS_DELEG_CREATE_SETS: 131 if (who[1] != ZFS_DELEG_NA) 132 return (-1); 133 if (who[3] != '\0') 134 return (-1); 135 break; 136 137 case ZFS_DELEG_EVERYONE: 138 case ZFS_DELEG_EVERYONE_SETS: 139 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 140 return (-1); 141 if (who[3] != '\0') 142 return (-1); 143 break; 144 145 default: 146 return (-1); 147 } 148 149 return (0); 150 } 151 152 int 153 zfs_deleg_verify_nvlist(nvlist_t *nvp) 154 { 155 nvpair_t *who, *perm_name; 156 nvlist_t *perms; 157 int error; 158 159 if (nvp == NULL) 160 return (-1); 161 162 who = nvlist_next_nvpair(nvp, NULL); 163 if (who == NULL) 164 return (-1); 165 166 do { 167 if (zfs_validate_who(nvpair_name(who))) 168 return (-1); 169 170 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms); 171 172 if (error && error != ENOENT) 173 return (-1); 174 if (error == ENOENT) 175 continue; 176 177 perm_name = nvlist_next_nvpair(perms, NULL); 178 if (perm_name == NULL) { 179 return (-1); 180 } 181 do { 182 error = zfs_valid_permission_name( 183 nvpair_name(perm_name)); 184 if (error) 185 return (-1); 186 } while (perm_name = nvlist_next_nvpair(perms, perm_name)); 187 } while (who = nvlist_next_nvpair(nvp, who)); 188 return (0); 189 } 190 191 /* 192 * Construct the base attribute name. The base attribute names 193 * are the "key" to locate the jump objects which contain the actual 194 * permissions. The base attribute names are encoded based on 195 * type of entry and whether it is a local or descendent permission. 196 * 197 * Arguments: 198 * attr - attribute name return string, attribute is assumed to be 199 * ZFS_MAX_DELEG_NAME long. 200 * type - type of entry to construct 201 * inheritchr - inheritance type (local,descendent, or NA for create and 202 * permission set definitions 203 * data - is either a permission set name or a 64 bit uid/gid. 204 */ 205 void 206 zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type, 207 char inheritchr, void *data) 208 { 209 int len = ZFS_MAX_DELEG_NAME; 210 uint64_t *id = data; 211 212 switch (type) { 213 case ZFS_DELEG_USER: 214 case ZFS_DELEG_GROUP: 215 case ZFS_DELEG_USER_SETS: 216 case ZFS_DELEG_GROUP_SETS: 217 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr, 218 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id); 219 break; 220 case ZFS_DELEG_NAMED_SET_SETS: 221 case ZFS_DELEG_NAMED_SET: 222 (void) snprintf(attr, len, "%c-%c%s", type, 223 ZFS_DELEG_FIELD_SEP_CHR, (char *)data); 224 break; 225 case ZFS_DELEG_CREATE: 226 case ZFS_DELEG_CREATE_SETS: 227 (void) snprintf(attr, len, "%c-%c", type, 228 ZFS_DELEG_FIELD_SEP_CHR); 229 break; 230 case ZFS_DELEG_EVERYONE: 231 case ZFS_DELEG_EVERYONE_SETS: 232 (void) snprintf(attr, len, "%c%c%c", type, inheritchr, 233 ZFS_DELEG_FIELD_SEP_CHR); 234 break; 235 default: 236 ASSERT(!"bad zfs_deleg_who_type_t"); 237 } 238 } 239