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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 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_NONE }, 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 {NULL, ZFS_DELEG_NOTE_NONE } 73 }; 74 75 static int 76 zfs_valid_permission_name(const char *perm) 77 { 78 if (zfs_deleg_canonicalize_perm(perm)) 79 return (0); 80 81 return (permset_namecheck(perm, NULL, NULL)); 82 } 83 84 const char * 85 zfs_deleg_canonicalize_perm(const char *perm) 86 { 87 int i; 88 zfs_prop_t prop; 89 90 for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) { 91 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0) 92 return (perm); 93 } 94 95 prop = zfs_name_to_prop(perm); 96 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop)) 97 return (zfs_prop_to_name(prop)); 98 return (NULL); 99 100 } 101 102 static int 103 zfs_validate_who(char *who) 104 { 105 char *p; 106 107 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR) 108 return (-1); 109 110 switch (who[0]) { 111 case ZFS_DELEG_USER: 112 case ZFS_DELEG_GROUP: 113 case ZFS_DELEG_USER_SETS: 114 case ZFS_DELEG_GROUP_SETS: 115 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 116 return (-1); 117 for (p = &who[3]; *p; p++) 118 if (!isdigit(*p)) 119 return (-1); 120 break; 121 122 case ZFS_DELEG_NAMED_SET: 123 case ZFS_DELEG_NAMED_SET_SETS: 124 if (who[1] != ZFS_DELEG_NA) 125 return (-1); 126 return (permset_namecheck(&who[3], NULL, NULL)); 127 128 case ZFS_DELEG_CREATE: 129 case ZFS_DELEG_CREATE_SETS: 130 if (who[1] != ZFS_DELEG_NA) 131 return (-1); 132 if (who[3] != '\0') 133 return (-1); 134 break; 135 136 case ZFS_DELEG_EVERYONE: 137 case ZFS_DELEG_EVERYONE_SETS: 138 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 139 return (-1); 140 if (who[3] != '\0') 141 return (-1); 142 break; 143 144 default: 145 return (-1); 146 } 147 148 return (0); 149 } 150 151 int 152 zfs_deleg_verify_nvlist(nvlist_t *nvp) 153 { 154 nvpair_t *who, *perm_name; 155 nvlist_t *perms; 156 int error; 157 158 if (nvp == NULL) 159 return (-1); 160 161 who = nvlist_next_nvpair(nvp, NULL); 162 if (who == NULL) 163 return (-1); 164 165 do { 166 if (zfs_validate_who(nvpair_name(who))) 167 return (-1); 168 169 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms); 170 171 if (error && error != ENOENT) 172 return (-1); 173 if (error == ENOENT) 174 continue; 175 176 perm_name = nvlist_next_nvpair(perms, NULL); 177 if (perm_name == NULL) { 178 return (-1); 179 } 180 do { 181 error = zfs_valid_permission_name( 182 nvpair_name(perm_name)); 183 if (error) 184 return (-1); 185 } while (perm_name = nvlist_next_nvpair(perms, perm_name)); 186 } while (who = nvlist_next_nvpair(nvp, who)); 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