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/types.h> 27 #include <sys/param.h> 28 #include <sys/systm.h> 29 #include <sys/types.h> 30 #include <sys/malloc.h> 31 #include <sys/errno.h> 32 #include <sys/zfs_acl.h> 33 #include <sys/acl.h> 34 35 struct zfs2bsd { 36 uint32_t zb_zfs; 37 int zb_bsd; 38 }; 39 40 static const struct zfs2bsd perms[] = {{ACE_READ_DATA, ACL_READ_DATA}, 41 {ACE_WRITE_DATA, ACL_WRITE_DATA}, 42 {ACE_EXECUTE, ACL_EXECUTE}, 43 {ACE_APPEND_DATA, ACL_APPEND_DATA}, 44 {ACE_DELETE_CHILD, ACL_DELETE_CHILD}, 45 {ACE_DELETE, ACL_DELETE}, 46 {ACE_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES}, 47 {ACE_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES}, 48 {ACE_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS}, 49 {ACE_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS}, 50 {ACE_READ_ACL, ACL_READ_ACL}, 51 {ACE_WRITE_ACL, ACL_WRITE_ACL}, 52 {ACE_WRITE_OWNER, ACL_WRITE_OWNER}, 53 {ACE_SYNCHRONIZE, ACL_SYNCHRONIZE}, 54 {0, 0}}; 55 56 static const struct zfs2bsd flags[] = {{ACE_FILE_INHERIT_ACE, 57 ACL_ENTRY_FILE_INHERIT}, 58 {ACE_DIRECTORY_INHERIT_ACE, 59 ACL_ENTRY_DIRECTORY_INHERIT}, 60 {ACE_NO_PROPAGATE_INHERIT_ACE, 61 ACL_ENTRY_NO_PROPAGATE_INHERIT}, 62 {ACE_INHERIT_ONLY_ACE, 63 ACL_ENTRY_INHERIT_ONLY}, 64 {ACE_INHERITED_ACE, 65 ACL_ENTRY_INHERITED}, 66 {ACE_SUCCESSFUL_ACCESS_ACE_FLAG, 67 ACL_ENTRY_SUCCESSFUL_ACCESS}, 68 {ACE_FAILED_ACCESS_ACE_FLAG, 69 ACL_ENTRY_FAILED_ACCESS}, 70 {0, 0}}; 71 72 static int 73 _bsd_from_zfs(uint32_t zfs, const struct zfs2bsd *table) 74 { 75 const struct zfs2bsd *tmp; 76 int bsd = 0; 77 78 for (tmp = table; tmp->zb_zfs != 0; tmp++) { 79 if (zfs & tmp->zb_zfs) 80 bsd |= tmp->zb_bsd; 81 } 82 83 return (bsd); 84 } 85 86 static uint32_t 87 _zfs_from_bsd(int bsd, const struct zfs2bsd *table) 88 { 89 const struct zfs2bsd *tmp; 90 uint32_t zfs = 0; 91 92 for (tmp = table; tmp->zb_bsd != 0; tmp++) { 93 if (bsd & tmp->zb_bsd) 94 zfs |= tmp->zb_zfs; 95 } 96 97 return (zfs); 98 } 99 100 int 101 acl_from_aces(struct acl *aclp, const ace_t *aces, int nentries) 102 { 103 int i; 104 struct acl_entry *entry; 105 const ace_t *ace; 106 107 if (nentries < 1) { 108 printf("acl_from_aces: empty ZFS ACL; returning EINVAL.\n"); 109 return (EINVAL); 110 } 111 112 if (nentries > ACL_MAX_ENTRIES) { 113 /* 114 * I believe it may happen only when moving a pool 115 * from SunOS to FreeBSD. 116 */ 117 printf("acl_from_aces: ZFS ACL too big to fit " 118 "into 'struct acl'; returning EINVAL.\n"); 119 return (EINVAL); 120 } 121 122 memset(aclp, 0, sizeof (*aclp)); 123 aclp->acl_maxcnt = ACL_MAX_ENTRIES; 124 aclp->acl_cnt = nentries; 125 126 for (i = 0; i < nentries; i++) { 127 entry = &(aclp->acl_entry[i]); 128 ace = &(aces[i]); 129 130 if (ace->a_flags & ACE_OWNER) 131 entry->ae_tag = ACL_USER_OBJ; 132 else if (ace->a_flags & ACE_GROUP) 133 entry->ae_tag = ACL_GROUP_OBJ; 134 else if (ace->a_flags & ACE_EVERYONE) 135 entry->ae_tag = ACL_EVERYONE; 136 else if (ace->a_flags & ACE_IDENTIFIER_GROUP) 137 entry->ae_tag = ACL_GROUP; 138 else 139 entry->ae_tag = ACL_USER; 140 141 if (entry->ae_tag == ACL_USER || entry->ae_tag == ACL_GROUP) 142 entry->ae_id = ace->a_who; 143 else 144 entry->ae_id = ACL_UNDEFINED_ID; 145 146 entry->ae_perm = _bsd_from_zfs(ace->a_access_mask, perms); 147 entry->ae_flags = _bsd_from_zfs(ace->a_flags, flags); 148 149 switch (ace->a_type) { 150 case ACE_ACCESS_ALLOWED_ACE_TYPE: 151 entry->ae_entry_type = ACL_ENTRY_TYPE_ALLOW; 152 break; 153 case ACE_ACCESS_DENIED_ACE_TYPE: 154 entry->ae_entry_type = ACL_ENTRY_TYPE_DENY; 155 break; 156 case ACE_SYSTEM_AUDIT_ACE_TYPE: 157 entry->ae_entry_type = ACL_ENTRY_TYPE_AUDIT; 158 break; 159 case ACE_SYSTEM_ALARM_ACE_TYPE: 160 entry->ae_entry_type = ACL_ENTRY_TYPE_ALARM; 161 break; 162 default: 163 panic("acl_from_aces: a_type is 0x%x", ace->a_type); 164 } 165 } 166 167 return (0); 168 } 169 170 void 171 aces_from_acl(ace_t *aces, int *nentries, const struct acl *aclp) 172 { 173 int i; 174 const struct acl_entry *entry; 175 ace_t *ace; 176 177 memset(aces, 0, sizeof (*aces) * aclp->acl_cnt); 178 179 *nentries = aclp->acl_cnt; 180 181 for (i = 0; i < aclp->acl_cnt; i++) { 182 entry = &(aclp->acl_entry[i]); 183 ace = &(aces[i]); 184 185 ace->a_who = entry->ae_id; 186 187 if (entry->ae_tag == ACL_USER_OBJ) 188 ace->a_flags = ACE_OWNER; 189 else if (entry->ae_tag == ACL_GROUP_OBJ) 190 ace->a_flags = (ACE_GROUP | ACE_IDENTIFIER_GROUP); 191 else if (entry->ae_tag == ACL_GROUP) 192 ace->a_flags = ACE_IDENTIFIER_GROUP; 193 else if (entry->ae_tag == ACL_EVERYONE) 194 ace->a_flags = ACE_EVERYONE; 195 else /* ACL_USER */ 196 ace->a_flags = 0; 197 198 ace->a_access_mask = _zfs_from_bsd(entry->ae_perm, perms); 199 ace->a_flags |= _zfs_from_bsd(entry->ae_flags, flags); 200 201 switch (entry->ae_entry_type) { 202 case ACL_ENTRY_TYPE_ALLOW: 203 ace->a_type = ACE_ACCESS_ALLOWED_ACE_TYPE; 204 break; 205 case ACL_ENTRY_TYPE_DENY: 206 ace->a_type = ACE_ACCESS_DENIED_ACE_TYPE; 207 break; 208 case ACL_ENTRY_TYPE_ALARM: 209 ace->a_type = ACE_SYSTEM_ALARM_ACE_TYPE; 210 break; 211 case ACL_ENTRY_TYPE_AUDIT: 212 ace->a_type = ACE_SYSTEM_AUDIT_ACE_TYPE; 213 break; 214 default: 215 panic("aces_from_acl: ae_entry_type is 0x%x", 216 entry->ae_entry_type); 217 } 218 } 219 } 220