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 2008 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 * Keep this table in sorted order 50 * 51 * This table is used for displaying all permissions for 52 * zfs allow 53 */ 54 55 zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = { 56 {ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW}, 57 {ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE }, 58 {ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE }, 59 {ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY }, 60 {ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT }, 61 {ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE }, 62 {ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE }, 63 {ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME }, 64 {ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK }, 65 {ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT }, 66 {ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE }, 67 {ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_NONE }, 68 {ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP }, 69 {NULL, ZFS_DELEG_NOTE_NONE } 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 } while (who = nvlist_next_nvpair(nvp, who)); 184 return (0); 185 } 186 187 /* 188 * Construct the base attribute name. The base attribute names 189 * are the "key" to locate the jump objects which contain the actual 190 * permissions. The base attribute names are encoded based on 191 * type of entry and whether it is a local or descendent permission. 192 * 193 * Arguments: 194 * attr - attribute name return string, attribute is assumed to be 195 * ZFS_MAX_DELEG_NAME long. 196 * type - type of entry to construct 197 * inheritchr - inheritance type (local,descendent, or NA for create and 198 * permission set definitions 199 * data - is either a permission set name or a 64 bit uid/gid. 200 */ 201 void 202 zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type, 203 char inheritchr, void *data) 204 { 205 int len = ZFS_MAX_DELEG_NAME; 206 uint64_t *id = data; 207 208 switch (type) { 209 case ZFS_DELEG_USER: 210 case ZFS_DELEG_GROUP: 211 case ZFS_DELEG_USER_SETS: 212 case ZFS_DELEG_GROUP_SETS: 213 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr, 214 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id); 215 break; 216 case ZFS_DELEG_NAMED_SET_SETS: 217 case ZFS_DELEG_NAMED_SET: 218 (void) snprintf(attr, len, "%c-%c%s", type, 219 ZFS_DELEG_FIELD_SEP_CHR, (char *)data); 220 break; 221 case ZFS_DELEG_CREATE: 222 case ZFS_DELEG_CREATE_SETS: 223 (void) snprintf(attr, len, "%c-%c", type, 224 ZFS_DELEG_FIELD_SEP_CHR); 225 break; 226 case ZFS_DELEG_EVERYONE: 227 case ZFS_DELEG_EVERYONE_SETS: 228 (void) snprintf(attr, len, "%c%c%c", type, inheritchr, 229 ZFS_DELEG_FIELD_SEP_CHR); 230 break; 231 default: 232 ASSERT(!"bad zfs_deleg_who_type_t"); 233 } 234 } 235