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 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 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 /* XXX includes zfs_context.h, so why bother with the above? */ 41 #include <sys/dsl_deleg.h> 42 #include "zfs_prop.h" 43 #include "zfs_deleg.h" 44 #include "zfs_namecheck.h" 45 46 /* 47 * permission table 48 */ 49 50 char *zfs_deleg_perm_tab[] = { 51 ZFS_DELEG_PERM_CREATE, 52 ZFS_DELEG_PERM_DESTROY, 53 ZFS_DELEG_PERM_SNAPSHOT, 54 ZFS_DELEG_PERM_ROLLBACK, 55 ZFS_DELEG_PERM_CLONE, 56 ZFS_DELEG_PERM_PROMOTE, 57 ZFS_DELEG_PERM_RENAME, 58 ZFS_DELEG_PERM_MOUNT, 59 ZFS_DELEG_PERM_SHARE, 60 ZFS_DELEG_PERM_SEND, 61 ZFS_DELEG_PERM_RECEIVE, 62 ZFS_DELEG_PERM_ALLOW, 63 ZFS_DELEG_PERM_USERPROP, 64 NULL 65 }; 66 67 static int 68 zfs_valid_permission_name(const char *perm) 69 { 70 if (zfs_deleg_canonicalize_perm(perm)) 71 return (0); 72 73 return (permset_namecheck(perm, NULL, NULL)); 74 } 75 76 const char * 77 zfs_deleg_canonicalize_perm(const char *perm) 78 { 79 int i; 80 zfs_prop_t prop; 81 82 for (i = 0; zfs_deleg_perm_tab[i] != NULL; i++) { 83 if (strcmp(perm, zfs_deleg_perm_tab[i]) == 0) 84 return (perm); 85 } 86 87 prop = zfs_name_to_prop(perm); 88 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop)) 89 return (zfs_prop_to_name(prop)); 90 return (NULL); 91 92 } 93 94 static int 95 zfs_validate_who(char *who) 96 { 97 char *p; 98 99 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR) 100 return (-1); 101 102 switch (who[0]) { 103 case ZFS_DELEG_USER: 104 case ZFS_DELEG_GROUP: 105 case ZFS_DELEG_USER_SETS: 106 case ZFS_DELEG_GROUP_SETS: 107 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 108 return (-1); 109 for (p = &who[3]; *p; p++) 110 if (!isdigit(*p)) 111 return (-1); 112 break; 113 114 case ZFS_DELEG_NAMED_SET: 115 case ZFS_DELEG_NAMED_SET_SETS: 116 if (who[1] != ZFS_DELEG_NA) 117 return (-1); 118 return (permset_namecheck(&who[3], NULL, NULL)); 119 120 case ZFS_DELEG_CREATE: 121 case ZFS_DELEG_CREATE_SETS: 122 if (who[1] != ZFS_DELEG_NA) 123 return (-1); 124 if (who[3] != '\0') 125 return (-1); 126 break; 127 128 case ZFS_DELEG_EVERYONE: 129 case ZFS_DELEG_EVERYONE_SETS: 130 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT) 131 return (-1); 132 if (who[3] != '\0') 133 return (-1); 134 break; 135 136 default: 137 return (-1); 138 } 139 140 return (0); 141 } 142 143 int 144 zfs_deleg_verify_nvlist(nvlist_t *nvp) 145 { 146 nvpair_t *who, *perm_name; 147 nvlist_t *perms; 148 int error; 149 150 if (nvp == NULL) 151 return (-1); 152 153 who = nvlist_next_nvpair(nvp, NULL); 154 if (who == NULL) 155 return (-1); 156 157 do { 158 if (zfs_validate_who(nvpair_name(who))) 159 return (-1); 160 161 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms); 162 163 if (error && error != ENOENT) 164 return (-1); 165 if (error == ENOENT) 166 continue; 167 168 perm_name = nvlist_next_nvpair(perms, NULL); 169 if (perm_name == NULL) { 170 return (-1); 171 } 172 do { 173 error = zfs_valid_permission_name( 174 nvpair_name(perm_name)); 175 if (error) 176 return (-1); 177 } while (perm_name = nvlist_next_nvpair(perms, perm_name)); 178 } while (who = nvlist_next_nvpair(nvp, who)); 179 return (0); 180 } 181 182 /* 183 * Construct the base attribute name. The base attribute names 184 * are the "key" to locate the jump objects which contain the actual 185 * permissions. The base attribute names are encoded based on 186 * type of entry and whether it is a local or descendent permission. 187 * 188 * Arguments: 189 * attr - attribute name return string, attribute is assumed to be 190 * ZFS_MAX_DELEG_NAME long. 191 * type - type of entry to construct 192 * inheritchr - inheritance type (local,descendent, or NA for create and 193 * permission set definitions 194 * data - is either a permission set name or a 64 bit uid/gid. 195 */ 196 void 197 zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type, 198 char inheritchr, void *data) 199 { 200 int len = ZFS_MAX_DELEG_NAME; 201 uint64_t *id = data; 202 203 switch (type) { 204 case ZFS_DELEG_USER: 205 case ZFS_DELEG_GROUP: 206 case ZFS_DELEG_USER_SETS: 207 case ZFS_DELEG_GROUP_SETS: 208 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr, 209 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id); 210 break; 211 case ZFS_DELEG_NAMED_SET_SETS: 212 case ZFS_DELEG_NAMED_SET: 213 (void) snprintf(attr, len, "%c-%c%s", type, 214 ZFS_DELEG_FIELD_SEP_CHR, (char *)data); 215 break; 216 case ZFS_DELEG_CREATE: 217 case ZFS_DELEG_CREATE_SETS: 218 (void) snprintf(attr, len, "%c-%c", type, 219 ZFS_DELEG_FIELD_SEP_CHR); 220 break; 221 case ZFS_DELEG_EVERYONE: 222 case ZFS_DELEG_EVERYONE_SETS: 223 (void) snprintf(attr, len, "%c%c%c", type, inheritchr, 224 ZFS_DELEG_FIELD_SEP_CHR); 225 break; 226 default: 227 ASSERT(!"bad zfs_deleg_who_type_t"); 228 } 229 } 230