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