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/param.h> 27 #include <sys/systm.h> 28 #include <sys/types.h> 29 #include <sys/malloc.h> 30 #include <sys/errno.h> 31 #include <sys/zfs_acl.h> 32 #include <sys/acl.h> 33 34 struct zfs2bsd { 35 uint32_t zb_zfs; 36 int zb_bsd; 37 }; 38 39 struct zfs2bsd perms[] = {{ACE_READ_DATA, ACL_READ_DATA}, 40 {ACE_WRITE_DATA, ACL_WRITE_DATA}, 41 {ACE_EXECUTE, ACL_EXECUTE}, 42 {ACE_APPEND_DATA, ACL_APPEND_DATA}, 43 {ACE_DELETE_CHILD, ACL_DELETE_CHILD}, 44 {ACE_DELETE, ACL_DELETE}, 45 {ACE_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES}, 46 {ACE_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES}, 47 {ACE_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS}, 48 {ACE_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS}, 49 {ACE_READ_ACL, ACL_READ_ACL}, 50 {ACE_WRITE_ACL, ACL_WRITE_ACL}, 51 {ACE_WRITE_OWNER, ACL_WRITE_OWNER}, 52 {ACE_SYNCHRONIZE, ACL_SYNCHRONIZE}, 53 {0, 0}}; 54 55 struct zfs2bsd flags[] = {{ACE_FILE_INHERIT_ACE, 56 ACL_ENTRY_FILE_INHERIT}, 57 {ACE_DIRECTORY_INHERIT_ACE, 58 ACL_ENTRY_DIRECTORY_INHERIT}, 59 {ACE_NO_PROPAGATE_INHERIT_ACE, 60 ACL_ENTRY_NO_PROPAGATE_INHERIT}, 61 {ACE_INHERIT_ONLY_ACE, 62 ACL_ENTRY_INHERIT_ONLY}, 63 {ACE_INHERITED_ACE, 64 ACL_ENTRY_INHERITED}, 65 {ACE_SUCCESSFUL_ACCESS_ACE_FLAG, 66 ACL_ENTRY_SUCCESSFUL_ACCESS}, 67 {ACE_FAILED_ACCESS_ACE_FLAG, 68 ACL_ENTRY_FAILED_ACCESS}, 69 {0, 0}}; 70 71 static int 72 _bsd_from_zfs(uint32_t zfs, const struct zfs2bsd *table) 73 { 74 const struct zfs2bsd *tmp; 75 int bsd = 0; 76 77 for (tmp = table; tmp->zb_zfs != 0; tmp++) { 78 if (zfs & tmp->zb_zfs) 79 bsd |= tmp->zb_bsd; 80 } 81 82 return (bsd); 83 } 84 85 static uint32_t 86 _zfs_from_bsd(int bsd, const struct zfs2bsd *table) 87 { 88 const struct zfs2bsd *tmp; 89 uint32_t zfs = 0; 90 91 for (tmp = table; tmp->zb_bsd != 0; tmp++) { 92 if (bsd & tmp->zb_bsd) 93 zfs |= tmp->zb_zfs; 94 } 95 96 return (zfs); 97 } 98 99 int 100 acl_from_aces(struct acl *aclp, const ace_t *aces, int nentries) 101 { 102 int i; 103 struct acl_entry *entry; 104 const ace_t *ace; 105 106 if (nentries < 1) { 107 printf("acl_from_aces: empty ZFS ACL; returning EINVAL.\n"); 108 return (EINVAL); 109 } 110 111 if (nentries > ACL_MAX_ENTRIES) { 112 /* 113 * I believe it may happen only when moving a pool 114 * from SunOS to FreeBSD. 115 */ 116 printf("acl_from_aces: ZFS ACL too big to fit " 117 "into 'struct acl'; returning EINVAL.\n"); 118 return (EINVAL); 119 } 120 121 bzero(aclp, sizeof(*aclp)); 122 aclp->acl_maxcnt = ACL_MAX_ENTRIES; 123 aclp->acl_cnt = nentries; 124 125 for (i = 0; i < nentries; i++) { 126 entry = &(aclp->acl_entry[i]); 127 ace = &(aces[i]); 128 129 if (ace->a_flags & ACE_OWNER) 130 entry->ae_tag = ACL_USER_OBJ; 131 else if (ace->a_flags & ACE_GROUP) 132 entry->ae_tag = ACL_GROUP_OBJ; 133 else if (ace->a_flags & ACE_EVERYONE) 134 entry->ae_tag = ACL_EVERYONE; 135 else if (ace->a_flags & ACE_IDENTIFIER_GROUP) 136 entry->ae_tag = ACL_GROUP; 137 else 138 entry->ae_tag = ACL_USER; 139 140 if (entry->ae_tag == ACL_USER || entry->ae_tag == ACL_GROUP) 141 entry->ae_id = ace->a_who; 142 else 143 entry->ae_id = ACL_UNDEFINED_ID; 144 145 entry->ae_perm = _bsd_from_zfs(ace->a_access_mask, perms); 146 entry->ae_flags = _bsd_from_zfs(ace->a_flags, flags); 147 148 switch (ace->a_type) { 149 case ACE_ACCESS_ALLOWED_ACE_TYPE: 150 entry->ae_entry_type = ACL_ENTRY_TYPE_ALLOW; 151 break; 152 case ACE_ACCESS_DENIED_ACE_TYPE: 153 entry->ae_entry_type = ACL_ENTRY_TYPE_DENY; 154 break; 155 case ACE_SYSTEM_AUDIT_ACE_TYPE: 156 entry->ae_entry_type = ACL_ENTRY_TYPE_AUDIT; 157 break; 158 case ACE_SYSTEM_ALARM_ACE_TYPE: 159 entry->ae_entry_type = ACL_ENTRY_TYPE_ALARM; 160 break; 161 default: 162 panic("acl_from_aces: a_type is 0x%x", ace->a_type); 163 } 164 } 165 166 return (0); 167 } 168 169 void 170 aces_from_acl(ace_t *aces, int *nentries, const struct acl *aclp) 171 { 172 int i; 173 const struct acl_entry *entry; 174 ace_t *ace; 175 176 bzero(aces, sizeof(*aces) * aclp->acl_cnt); 177 178 *nentries = aclp->acl_cnt; 179 180 for (i = 0; i < aclp->acl_cnt; i++) { 181 entry = &(aclp->acl_entry[i]); 182 ace = &(aces[i]); 183 184 ace->a_who = entry->ae_id; 185 186 if (entry->ae_tag == ACL_USER_OBJ) 187 ace->a_flags = ACE_OWNER; 188 else if (entry->ae_tag == ACL_GROUP_OBJ) 189 ace->a_flags = (ACE_GROUP | ACE_IDENTIFIER_GROUP); 190 else if (entry->ae_tag == ACL_GROUP) 191 ace->a_flags = ACE_IDENTIFIER_GROUP; 192 else if (entry->ae_tag == ACL_EVERYONE) 193 ace->a_flags = ACE_EVERYONE; 194 else /* ACL_USER */ 195 ace->a_flags = 0; 196 197 ace->a_access_mask = _zfs_from_bsd(entry->ae_perm, perms); 198 ace->a_flags |= _zfs_from_bsd(entry->ae_flags, flags); 199 200 switch (entry->ae_entry_type) { 201 case ACL_ENTRY_TYPE_ALLOW: 202 ace->a_type = ACE_ACCESS_ALLOWED_ACE_TYPE; 203 break; 204 case ACL_ENTRY_TYPE_DENY: 205 ace->a_type = ACE_ACCESS_DENIED_ACE_TYPE; 206 break; 207 case ACL_ENTRY_TYPE_ALARM: 208 ace->a_type = ACE_SYSTEM_ALARM_ACE_TYPE; 209 break; 210 case ACL_ENTRY_TYPE_AUDIT: 211 ace->a_type = ACE_SYSTEM_AUDIT_ACE_TYPE; 212 break; 213 default: 214 panic("aces_from_acl: ae_entry_type is 0x%x", entry->ae_entry_type); 215 } 216 } 217 } 218