1 /* 2 * Copyright (c) 2008, 2009 Edward Tomasz Napierała <trasz@FreeBSD.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 __FBSDID("$FreeBSD$"); 28 29 #include <sys/types.h> 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/types.h> 33 #include <sys/malloc.h> 34 #include <sys/errno.h> 35 #include <sys/zfs_acl.h> 36 #include <sys/acl.h> 37 38 struct zfs2bsd { 39 uint32_t zb_zfs; 40 int zb_bsd; 41 }; 42 43 struct zfs2bsd perms[] = {{ACE_READ_DATA, ACL_READ_DATA}, 44 {ACE_WRITE_DATA, ACL_WRITE_DATA}, 45 {ACE_EXECUTE, ACL_EXECUTE}, 46 {ACE_APPEND_DATA, ACL_APPEND_DATA}, 47 {ACE_DELETE_CHILD, ACL_DELETE_CHILD}, 48 {ACE_DELETE, ACL_DELETE}, 49 {ACE_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES}, 50 {ACE_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES}, 51 {ACE_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS}, 52 {ACE_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS}, 53 {ACE_READ_ACL, ACL_READ_ACL}, 54 {ACE_WRITE_ACL, ACL_WRITE_ACL}, 55 {ACE_WRITE_OWNER, ACL_WRITE_OWNER}, 56 {ACE_SYNCHRONIZE, ACL_SYNCHRONIZE}, 57 {0, 0}}; 58 59 struct zfs2bsd flags[] = {{ACE_FILE_INHERIT_ACE, 60 ACL_ENTRY_FILE_INHERIT}, 61 {ACE_DIRECTORY_INHERIT_ACE, 62 ACL_ENTRY_DIRECTORY_INHERIT}, 63 {ACE_NO_PROPAGATE_INHERIT_ACE, 64 ACL_ENTRY_NO_PROPAGATE_INHERIT}, 65 {ACE_INHERIT_ONLY_ACE, 66 ACL_ENTRY_INHERIT_ONLY}, 67 {ACE_INHERITED_ACE, 68 ACL_ENTRY_INHERITED}, 69 {ACE_SUCCESSFUL_ACCESS_ACE_FLAG, 70 ACL_ENTRY_SUCCESSFUL_ACCESS}, 71 {ACE_FAILED_ACCESS_ACE_FLAG, 72 ACL_ENTRY_FAILED_ACCESS}, 73 {0, 0}}; 74 75 static int 76 _bsd_from_zfs(uint32_t zfs, const struct zfs2bsd *table) 77 { 78 const struct zfs2bsd *tmp; 79 int bsd = 0; 80 81 for (tmp = table; tmp->zb_zfs != 0; tmp++) { 82 if (zfs & tmp->zb_zfs) 83 bsd |= tmp->zb_bsd; 84 } 85 86 return (bsd); 87 } 88 89 static uint32_t 90 _zfs_from_bsd(int bsd, const struct zfs2bsd *table) 91 { 92 const struct zfs2bsd *tmp; 93 uint32_t zfs = 0; 94 95 for (tmp = table; tmp->zb_bsd != 0; tmp++) { 96 if (bsd & tmp->zb_bsd) 97 zfs |= tmp->zb_zfs; 98 } 99 100 return (zfs); 101 } 102 103 int 104 acl_from_aces(struct acl *aclp, const ace_t *aces, int nentries) 105 { 106 int i; 107 struct acl_entry *entry; 108 const ace_t *ace; 109 110 if (nentries < 1) { 111 printf("acl_from_aces: empty ZFS ACL; returning EINVAL.\n"); 112 return (EINVAL); 113 } 114 115 if (nentries > ACL_MAX_ENTRIES) { 116 /* 117 * I believe it may happen only when moving a pool 118 * from SunOS to FreeBSD. 119 */ 120 printf("acl_from_aces: ZFS ACL too big to fit " 121 "into 'struct acl'; returning EINVAL.\n"); 122 return (EINVAL); 123 } 124 125 bzero(aclp, sizeof (*aclp)); 126 aclp->acl_maxcnt = ACL_MAX_ENTRIES; 127 aclp->acl_cnt = nentries; 128 129 for (i = 0; i < nentries; i++) { 130 entry = &(aclp->acl_entry[i]); 131 ace = &(aces[i]); 132 133 if (ace->a_flags & ACE_OWNER) 134 entry->ae_tag = ACL_USER_OBJ; 135 else if (ace->a_flags & ACE_GROUP) 136 entry->ae_tag = ACL_GROUP_OBJ; 137 else if (ace->a_flags & ACE_EVERYONE) 138 entry->ae_tag = ACL_EVERYONE; 139 else if (ace->a_flags & ACE_IDENTIFIER_GROUP) 140 entry->ae_tag = ACL_GROUP; 141 else 142 entry->ae_tag = ACL_USER; 143 144 if (entry->ae_tag == ACL_USER || entry->ae_tag == ACL_GROUP) 145 entry->ae_id = ace->a_who; 146 else 147 entry->ae_id = ACL_UNDEFINED_ID; 148 149 entry->ae_perm = _bsd_from_zfs(ace->a_access_mask, perms); 150 entry->ae_flags = _bsd_from_zfs(ace->a_flags, flags); 151 152 switch (ace->a_type) { 153 case ACE_ACCESS_ALLOWED_ACE_TYPE: 154 entry->ae_entry_type = ACL_ENTRY_TYPE_ALLOW; 155 break; 156 case ACE_ACCESS_DENIED_ACE_TYPE: 157 entry->ae_entry_type = ACL_ENTRY_TYPE_DENY; 158 break; 159 case ACE_SYSTEM_AUDIT_ACE_TYPE: 160 entry->ae_entry_type = ACL_ENTRY_TYPE_AUDIT; 161 break; 162 case ACE_SYSTEM_ALARM_ACE_TYPE: 163 entry->ae_entry_type = ACL_ENTRY_TYPE_ALARM; 164 break; 165 default: 166 panic("acl_from_aces: a_type is 0x%x", ace->a_type); 167 } 168 } 169 170 return (0); 171 } 172 173 void 174 aces_from_acl(ace_t *aces, int *nentries, const struct acl *aclp) 175 { 176 int i; 177 const struct acl_entry *entry; 178 ace_t *ace; 179 180 bzero(aces, sizeof (*aces) * aclp->acl_cnt); 181 182 *nentries = aclp->acl_cnt; 183 184 for (i = 0; i < aclp->acl_cnt; i++) { 185 entry = &(aclp->acl_entry[i]); 186 ace = &(aces[i]); 187 188 ace->a_who = entry->ae_id; 189 190 if (entry->ae_tag == ACL_USER_OBJ) 191 ace->a_flags = ACE_OWNER; 192 else if (entry->ae_tag == ACL_GROUP_OBJ) 193 ace->a_flags = (ACE_GROUP | ACE_IDENTIFIER_GROUP); 194 else if (entry->ae_tag == ACL_GROUP) 195 ace->a_flags = ACE_IDENTIFIER_GROUP; 196 else if (entry->ae_tag == ACL_EVERYONE) 197 ace->a_flags = ACE_EVERYONE; 198 else /* ACL_USER */ 199 ace->a_flags = 0; 200 201 ace->a_access_mask = _zfs_from_bsd(entry->ae_perm, perms); 202 ace->a_flags |= _zfs_from_bsd(entry->ae_flags, flags); 203 204 switch (entry->ae_entry_type) { 205 case ACL_ENTRY_TYPE_ALLOW: 206 ace->a_type = ACE_ACCESS_ALLOWED_ACE_TYPE; 207 break; 208 case ACL_ENTRY_TYPE_DENY: 209 ace->a_type = ACE_ACCESS_DENIED_ACE_TYPE; 210 break; 211 case ACL_ENTRY_TYPE_ALARM: 212 ace->a_type = ACE_SYSTEM_ALARM_ACE_TYPE; 213 break; 214 case ACL_ENTRY_TYPE_AUDIT: 215 ace->a_type = ACE_SYSTEM_AUDIT_ACE_TYPE; 216 break; 217 default: 218 panic("aces_from_acl: ae_entry_type is 0x%x", 219 entry->ae_entry_type); 220 } 221 } 222 } 223