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