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 https://opensource.org/licenses/CDDL-1.0. 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 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/zfs_context.h> 27 #include <sys/vfs.h> 28 #include <sys/fs/zfs.h> 29 #include <sys/zfs_znode.h> 30 #include <sys/zfs_sa.h> 31 #include <sys/zfs_acl.h> 32 33 #ifndef _KERNEL 34 static 35 #endif 36 void 37 zfs_oldace_byteswap(ace_t *ace, int ace_cnt) 38 { 39 for (int i = 0; i != ace_cnt; i++, ace++) { 40 ace->a_who = BSWAP_32(ace->a_who); 41 ace->a_access_mask = BSWAP_32(ace->a_access_mask); 42 ace->a_flags = BSWAP_16(ace->a_flags); 43 ace->a_type = BSWAP_16(ace->a_type); 44 } 45 } 46 47 /* 48 * swap ace_t and ace_object_t 49 */ 50 #ifndef _KERNEL 51 static 52 #endif 53 void 54 zfs_ace_byteswap(void *buf, size_t size, boolean_t zfs_layout) 55 { 56 caddr_t end; 57 caddr_t ptr; 58 zfs_ace_t *zacep = NULL; 59 ace_t *acep; 60 uint16_t entry_type; 61 size_t entry_size; 62 int ace_type; 63 64 end = (caddr_t)buf + size; 65 ptr = buf; 66 67 while (ptr < end) { 68 if (zfs_layout) { 69 /* 70 * Avoid overrun. Embedded aces can have one 71 * of several sizes. We don't know exactly 72 * how many our present, only the size of the 73 * buffer containing them. That size may be 74 * larger than needed to hold the aces 75 * present. As long as we do not do any 76 * swapping beyond the end of our block we are 77 * okay. It is safe to swap any non-ace data 78 * within the block since it is just zeros. 79 */ 80 if (ptr + sizeof (zfs_ace_hdr_t) > end) { 81 break; 82 } 83 zacep = (zfs_ace_t *)ptr; 84 zacep->z_hdr.z_access_mask = 85 BSWAP_32(zacep->z_hdr.z_access_mask); 86 zacep->z_hdr.z_flags = BSWAP_16(zacep->z_hdr.z_flags); 87 ace_type = zacep->z_hdr.z_type = 88 BSWAP_16(zacep->z_hdr.z_type); 89 entry_type = zacep->z_hdr.z_flags & ACE_TYPE_FLAGS; 90 } else { 91 /* Overrun avoidance */ 92 if (ptr + sizeof (ace_t) > end) { 93 break; 94 } 95 acep = (ace_t *)ptr; 96 acep->a_access_mask = BSWAP_32(acep->a_access_mask); 97 acep->a_flags = BSWAP_16(acep->a_flags); 98 ace_type = acep->a_type = BSWAP_16(acep->a_type); 99 acep->a_who = BSWAP_32(acep->a_who); 100 entry_type = acep->a_flags & ACE_TYPE_FLAGS; 101 } 102 switch (entry_type) { 103 case ACE_OWNER: 104 case ACE_EVERYONE: 105 case (ACE_IDENTIFIER_GROUP | ACE_GROUP): 106 entry_size = zfs_layout ? 107 sizeof (zfs_ace_hdr_t) : sizeof (ace_t); 108 break; 109 case ACE_IDENTIFIER_GROUP: 110 default: 111 /* Overrun avoidance */ 112 if (zfs_layout) { 113 if (ptr + sizeof (zfs_ace_t) <= end) { 114 zacep->z_fuid = BSWAP_64(zacep->z_fuid); 115 } else { 116 entry_size = sizeof (zfs_ace_t); 117 break; 118 } 119 } 120 switch (ace_type) { 121 case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE: 122 case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE: 123 case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE: 124 case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE: 125 entry_size = zfs_layout ? 126 sizeof (zfs_object_ace_t) : 127 sizeof (ace_object_t); 128 break; 129 default: 130 entry_size = zfs_layout ? sizeof (zfs_ace_t) : 131 sizeof (ace_t); 132 break; 133 } 134 } 135 ptr = ptr + entry_size; 136 } 137 } 138 139 void 140 zfs_oldacl_byteswap(void *buf, size_t size) 141 { 142 /* 143 * Arggh, since we don't know how many ACEs are in 144 * the array, we have to swap the entire block 145 */ 146 zfs_oldace_byteswap((ace_t *)buf, size / sizeof (ace_t)); 147 } 148 149 void 150 zfs_acl_byteswap(void *buf, size_t size) 151 { 152 zfs_ace_byteswap(buf, size, B_TRUE); 153 } 154 155 void 156 zfs_znode_byteswap(void *buf, size_t size) 157 { 158 znode_phys_t *zp = buf; 159 160 ASSERT(size >= sizeof (znode_phys_t)); 161 162 zp->zp_crtime[0] = BSWAP_64(zp->zp_crtime[0]); 163 zp->zp_crtime[1] = BSWAP_64(zp->zp_crtime[1]); 164 zp->zp_atime[0] = BSWAP_64(zp->zp_atime[0]); 165 zp->zp_atime[1] = BSWAP_64(zp->zp_atime[1]); 166 zp->zp_mtime[0] = BSWAP_64(zp->zp_mtime[0]); 167 zp->zp_mtime[1] = BSWAP_64(zp->zp_mtime[1]); 168 zp->zp_ctime[0] = BSWAP_64(zp->zp_ctime[0]); 169 zp->zp_ctime[1] = BSWAP_64(zp->zp_ctime[1]); 170 zp->zp_gen = BSWAP_64(zp->zp_gen); 171 zp->zp_mode = BSWAP_64(zp->zp_mode); 172 zp->zp_size = BSWAP_64(zp->zp_size); 173 zp->zp_parent = BSWAP_64(zp->zp_parent); 174 zp->zp_links = BSWAP_64(zp->zp_links); 175 zp->zp_xattr = BSWAP_64(zp->zp_xattr); 176 zp->zp_rdev = BSWAP_64(zp->zp_rdev); 177 zp->zp_flags = BSWAP_64(zp->zp_flags); 178 zp->zp_uid = BSWAP_64(zp->zp_uid); 179 zp->zp_gid = BSWAP_64(zp->zp_gid); 180 zp->zp_zap = BSWAP_64(zp->zp_zap); 181 zp->zp_pad[0] = BSWAP_64(zp->zp_pad[0]); 182 zp->zp_pad[1] = BSWAP_64(zp->zp_pad[1]); 183 zp->zp_pad[2] = BSWAP_64(zp->zp_pad[2]); 184 185 zp->zp_acl.z_acl_extern_obj = BSWAP_64(zp->zp_acl.z_acl_extern_obj); 186 zp->zp_acl.z_acl_size = BSWAP_32(zp->zp_acl.z_acl_size); 187 zp->zp_acl.z_acl_version = BSWAP_16(zp->zp_acl.z_acl_version); 188 zp->zp_acl.z_acl_count = BSWAP_16(zp->zp_acl.z_acl_count); 189 if (zp->zp_acl.z_acl_version == ZFS_ACL_VERSION) { 190 zfs_acl_byteswap((void *)&zp->zp_acl.z_ace_data[0], 191 ZFS_ACE_SPACE); 192 } else { 193 zfs_oldace_byteswap((ace_t *)&zp->zp_acl.z_ace_data[0], 194 ACE_SLOT_CNT); 195 } 196 } 197 198 #if defined(_KERNEL) 199 EXPORT_SYMBOL(zfs_oldacl_byteswap); 200 EXPORT_SYMBOL(zfs_acl_byteswap); 201 EXPORT_SYMBOL(zfs_znode_byteswap); 202 #endif 203