external/cddl/osnet/dist/uts/common/fs/zfs/zfs_byteswap.c

   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 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #pragma ident   "%Z%%M% %I%     %E% SMI"
  27
  28 #include <sys/zfs_context.h>
  29 #include <sys/vfs.h>
  30 #include <sys/fs/zfs.h>
  31 #include <sys/zfs_znode.h>
  32 #include <sys/zfs_acl.h>
  33
  34 void
  35 zfs_oldace_byteswap(ace_t *ace, int ace_cnt)
  36 {
  37         int i;
  38
  39         for (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_oject_t
  49  */
  50 void
  51 zfs_ace_byteswap(void *buf, size_t size, boolean_t zfs_layout)
  52 {
  53         caddr_t end;
  54         caddr_t ptr;
  55         zfs_ace_t *zacep;
  56         ace_t *acep;
  57         uint16_t entry_type;
  58         size_t entry_size;
  59         int ace_type;
  60
  61         end = (caddr_t)buf + size;
  62         ptr = buf;
  63
  64         while (ptr < end) {
  65                 if (zfs_layout) {
  66                         zacep = (zfs_ace_t *)ptr;
  67                         zacep->z_hdr.z_access_mask =
  68                             BSWAP_32(zacep->z_hdr.z_access_mask);
  69                         zacep->z_hdr.z_flags = BSWAP_16(zacep->z_hdr.z_flags);
  70                         ace_type = zacep->z_hdr.z_type =
  71                             BSWAP_16(zacep->z_hdr.z_type);
  72                         entry_type = zacep->z_hdr.z_flags & ACE_TYPE_FLAGS;
  73                 } else {
  74                         acep = (ace_t *)ptr;
  75                         acep->a_access_mask = BSWAP_32(acep->a_access_mask);
  76                         acep->a_flags = BSWAP_16(acep->a_flags);
  77                         ace_type = acep->a_type = BSWAP_16(acep->a_type);
  78                         acep->a_who = BSWAP_32(acep->a_who);
  79                         entry_type = acep->a_flags & ACE_TYPE_FLAGS;
  80                 }
  81                 switch (entry_type) {
  82                 case ACE_OWNER:
  83                 case ACE_EVERYONE:
  84                 case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
  85                         entry_size = zfs_layout ?
  86                             sizeof (zfs_ace_hdr_t) : sizeof (ace_t);
  87                         break;
  88                 case ACE_IDENTIFIER_GROUP:
  89                 default:
  90                         if (zfs_layout) {
  91                                 zacep->z_fuid = BSWAP_64(zacep->z_fuid);
  92                         }
  93                         switch (ace_type) {
  94                         case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
  95                         case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
  96                         case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
  97                         case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
  98                                 entry_size = zfs_layout ?
  99                                     sizeof (zfs_object_ace_t) :
 100                                     sizeof (ace_object_t);
 101                                 break;
 102                         default:
 103                                 entry_size = zfs_layout ? sizeof (zfs_ace_t) :
 104                                     sizeof (ace_t);
 105                                 break;
 106                         }
 107                 }
 108                 ptr = ptr + entry_size;
 109         }
 110 }
 111
 112 /* ARGSUSED */
 113 void
 114 zfs_oldacl_byteswap(void *buf, size_t size)
 115 {
 116         int cnt;
 117
 118         /*
 119          * Arggh, since we don't know how many ACEs are in
 120          * the array, we have to swap the entire block
 121          */
 122
 123         cnt = size / sizeof (ace_t);
 124
 125         zfs_oldace_byteswap((ace_t *)buf, cnt);
 126 }
 127
 128 /* ARGSUSED */
 129 void
 130 zfs_acl_byteswap(void *buf, size_t size)
 131 {
 132         zfs_ace_byteswap(buf, size, B_TRUE);
 133 }
 134
 135 void
 136 zfs_znode_byteswap(void *buf, size_t size)
 137 {
 138         znode_phys_t *zp = buf;
 139
 140         ASSERT(size >= sizeof (znode_phys_t));
 141
 142         zp->zp_crtime[0] = BSWAP_64(zp->zp_crtime[0]);
 143         zp->zp_crtime[1] = BSWAP_64(zp->zp_crtime[1]);
 144         zp->zp_atime[0] = BSWAP_64(zp->zp_atime[0]);
 145         zp->zp_atime[1] = BSWAP_64(zp->zp_atime[1]);
 146         zp->zp_mtime[0] = BSWAP_64(zp->zp_mtime[0]);
 147         zp->zp_mtime[1] = BSWAP_64(zp->zp_mtime[1]);
 148         zp->zp_ctime[0] = BSWAP_64(zp->zp_ctime[0]);
 149         zp->zp_ctime[1] = BSWAP_64(zp->zp_ctime[1]);
 150         zp->zp_gen = BSWAP_64(zp->zp_gen);
 151         zp->zp_mode = BSWAP_64(zp->zp_mode);
 152         zp->zp_size = BSWAP_64(zp->zp_size);
 153         zp->zp_parent = BSWAP_64(zp->zp_parent);
 154         zp->zp_links = BSWAP_64(zp->zp_links);
 155         zp->zp_xattr = BSWAP_64(zp->zp_xattr);
 156         zp->zp_rdev = BSWAP_64(zp->zp_rdev);
 157         zp->zp_flags = BSWAP_64(zp->zp_flags);
 158         zp->zp_uid = BSWAP_64(zp->zp_uid);
 159         zp->zp_gid = BSWAP_64(zp->zp_gid);
 160         zp->zp_zap = BSWAP_64(zp->zp_zap);
 161         zp->zp_pad[0] = BSWAP_64(zp->zp_pad[0]);
 162         zp->zp_pad[1] = BSWAP_64(zp->zp_pad[1]);
 163         zp->zp_pad[2] = BSWAP_64(zp->zp_pad[2]);
 164
 165         zp->zp_acl.z_acl_extern_obj = BSWAP_64(zp->zp_acl.z_acl_extern_obj);
 166         zp->zp_acl.z_acl_size = BSWAP_32(zp->zp_acl.z_acl_size);
 167         zp->zp_acl.z_acl_version = BSWAP_16(zp->zp_acl.z_acl_version);
 168         zp->zp_acl.z_acl_count = BSWAP_16(zp->zp_acl.z_acl_count);
 169         if (zp->zp_acl.z_acl_version == ZFS_ACL_VERSION) {
 170                 zfs_acl_byteswap((void *)&zp->zp_acl.z_ace_data[0],
 171                     ZFS_ACE_SPACE);
 172         } else
 173                 zfs_oldace_byteswap((ace_t *)&zp->zp_acl.z_ace_data[0],
 174                     ACE_SLOT_CNT);
 175 }