zfs_deleg.c revision 263407
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 */ 26 27#include <sys/zfs_context.h> 28 29#if defined(_KERNEL) 30#include <sys/systm.h> 31#include <sys/sunddi.h> 32#include <sys/ctype.h> 33#else 34#include <stdio.h> 35#include <unistd.h> 36#include <strings.h> 37#include <libnvpair.h> 38#include <ctype.h> 39#endif 40#include <sys/dsl_deleg.h> 41#include "zfs_prop.h" 42#include "zfs_deleg.h" 43#include "zfs_namecheck.h" 44 45zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = { 46 {ZFS_DELEG_PERM_ALLOW}, 47 {ZFS_DELEG_PERM_BOOKMARK}, 48 {ZFS_DELEG_PERM_CLONE}, 49 {ZFS_DELEG_PERM_CREATE}, 50 {ZFS_DELEG_PERM_DESTROY}, 51 {ZFS_DELEG_PERM_DIFF}, 52 {ZFS_DELEG_PERM_MOUNT}, 53 {ZFS_DELEG_PERM_PROMOTE}, 54 {ZFS_DELEG_PERM_RECEIVE}, 55 {ZFS_DELEG_PERM_RENAME}, 56 {ZFS_DELEG_PERM_ROLLBACK}, 57 {ZFS_DELEG_PERM_SNAPSHOT}, 58 {ZFS_DELEG_PERM_SHARE}, 59 {ZFS_DELEG_PERM_SEND}, 60 {ZFS_DELEG_PERM_USERPROP}, 61 {ZFS_DELEG_PERM_USERQUOTA}, 62 {ZFS_DELEG_PERM_GROUPQUOTA}, 63 {ZFS_DELEG_PERM_USERUSED}, 64 {ZFS_DELEG_PERM_GROUPUSED}, 65 {ZFS_DELEG_PERM_HOLD}, 66 {ZFS_DELEG_PERM_RELEASE}, 67 {NULL} 68}; 69 70static int 71zfs_valid_permission_name(const char *perm) 72{ 73 if (zfs_deleg_canonicalize_perm(perm)) 74 return (0); 75 76 return (permset_namecheck(perm, NULL, NULL)); 77} 78 79const char * 80zfs_deleg_canonicalize_perm(const char *perm) 81{ 82 int i; 83 zfs_prop_t prop; 84 85 for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) { 86 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0) 87 return (perm); 88 } 89 90 prop = zfs_name_to_prop(perm); 91 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop)) 92 return (zfs_prop_to_name(prop)); 93 return (NULL); 94 95} 96 97static int 98zfs_validate_who(char *who) 99{ 100 char *p; 101 102 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR) 103 return (-1); 104 105 switch (who[0]) { 106 case ZFS_DELEG_USER: 107 case ZFS_DELEG_GROUP: 108 case ZFS_DELEG_USER_SETS: 109 case ZFS_DELEG_GROUP_SETS: 110 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 111 return (-1); 112 for (p = &who[3]; *p; p++) 113 if (!isdigit(*p)) 114 return (-1); 115 break; 116 117 case ZFS_DELEG_NAMED_SET: 118 case ZFS_DELEG_NAMED_SET_SETS: 119 if (who[1] != ZFS_DELEG_NA) 120 return (-1); 121 return (permset_namecheck(&who[3], NULL, NULL)); 122 123 case ZFS_DELEG_CREATE: 124 case ZFS_DELEG_CREATE_SETS: 125 if (who[1] != ZFS_DELEG_NA) 126 return (-1); 127 if (who[3] != '\0') 128 return (-1); 129 break; 130 131 case ZFS_DELEG_EVERYONE: 132 case ZFS_DELEG_EVERYONE_SETS: 133 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 134 return (-1); 135 if (who[3] != '\0') 136 return (-1); 137 break; 138 139 default: 140 return (-1); 141 } 142 143 return (0); 144} 145 146int 147zfs_deleg_verify_nvlist(nvlist_t *nvp) 148{ 149 nvpair_t *who, *perm_name; 150 nvlist_t *perms; 151 int error; 152 153 if (nvp == NULL) 154 return (-1); 155 156 who = nvlist_next_nvpair(nvp, NULL); 157 if (who == NULL) 158 return (-1); 159 160 do { 161 if (zfs_validate_who(nvpair_name(who))) 162 return (-1); 163 164 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms); 165 166 if (error && error != ENOENT) 167 return (-1); 168 if (error == ENOENT) 169 continue; 170 171 perm_name = nvlist_next_nvpair(perms, NULL); 172 if (perm_name == NULL) { 173 return (-1); 174 } 175 do { 176 error = zfs_valid_permission_name( 177 nvpair_name(perm_name)); 178 if (error) 179 return (-1); 180 } while (perm_name = nvlist_next_nvpair(perms, perm_name)); 181 } while (who = nvlist_next_nvpair(nvp, who)); 182 return (0); 183} 184 185/* 186 * Construct the base attribute name. The base attribute names 187 * are the "key" to locate the jump objects which contain the actual 188 * permissions. The base attribute names are encoded based on 189 * type of entry and whether it is a local or descendent permission. 190 * 191 * Arguments: 192 * attr - attribute name return string, attribute is assumed to be 193 * ZFS_MAX_DELEG_NAME long. 194 * type - type of entry to construct 195 * inheritchr - inheritance type (local,descendent, or NA for create and 196 * permission set definitions 197 * data - is either a permission set name or a 64 bit uid/gid. 198 */ 199void 200zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type, 201 char inheritchr, void *data) 202{ 203 int len = ZFS_MAX_DELEG_NAME; 204 uint64_t *id = data; 205 206 switch (type) { 207 case ZFS_DELEG_USER: 208 case ZFS_DELEG_GROUP: 209 case ZFS_DELEG_USER_SETS: 210 case ZFS_DELEG_GROUP_SETS: 211 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr, 212 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id); 213 break; 214 case ZFS_DELEG_NAMED_SET_SETS: 215 case ZFS_DELEG_NAMED_SET: 216 (void) snprintf(attr, len, "%c-%c%s", type, 217 ZFS_DELEG_FIELD_SEP_CHR, (char *)data); 218 break; 219 case ZFS_DELEG_CREATE: 220 case ZFS_DELEG_CREATE_SETS: 221 (void) snprintf(attr, len, "%c-%c", type, 222 ZFS_DELEG_FIELD_SEP_CHR); 223 break; 224 case ZFS_DELEG_EVERYONE: 225 case ZFS_DELEG_EVERYONE_SETS: 226 (void) snprintf(attr, len, "%c%c%c", type, inheritchr, 227 ZFS_DELEG_FIELD_SEP_CHR); 228 break; 229 default: 230 ASSERT(!"bad zfs_deleg_who_type_t"); 231 } 232} 233