205 lines
5.6 KiB
C
205 lines
5.6 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <sys/zfs_context.h>
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#include <sys/vfs.h>
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#include <sys/fs/zfs.h>
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#include <sys/zfs_znode.h>
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#include <sys/zfs_acl.h>
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void
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zfs_oldace_byteswap(ace_t *ace, int ace_cnt)
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{
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int i;
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for (i = 0; i != ace_cnt; i++, ace++) {
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ace->a_who = BSWAP_32(ace->a_who);
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ace->a_access_mask = BSWAP_32(ace->a_access_mask);
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ace->a_flags = BSWAP_16(ace->a_flags);
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ace->a_type = BSWAP_16(ace->a_type);
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}
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}
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/*
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* swap ace_t and ace_oject_t
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*/
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void
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zfs_ace_byteswap(void *buf, size_t size, boolean_t zfs_layout)
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{
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caddr_t end;
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caddr_t ptr;
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zfs_ace_t *zacep = NULL;
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ace_t *acep;
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uint16_t entry_type;
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size_t entry_size;
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int ace_type;
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end = (caddr_t)buf + size;
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ptr = buf;
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while (ptr < end) {
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if (zfs_layout) {
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/*
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* Avoid overrun. Embedded aces can have one
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* of several sizes. We don't know exactly
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* how many our present, only the size of the
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* buffer containing them. That size may be
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* larger than needed to hold the aces
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* present. As long as we do not do any
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* swapping beyond the end of our block we are
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* okay. It it safe to swap any non-ace data
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* within the block since it is just zeros.
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*/
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if (ptr + sizeof (zfs_ace_hdr_t) > end) {
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break;
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}
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zacep = (zfs_ace_t *)ptr;
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zacep->z_hdr.z_access_mask =
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BSWAP_32(zacep->z_hdr.z_access_mask);
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zacep->z_hdr.z_flags = BSWAP_16(zacep->z_hdr.z_flags);
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ace_type = zacep->z_hdr.z_type =
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BSWAP_16(zacep->z_hdr.z_type);
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entry_type = zacep->z_hdr.z_flags & ACE_TYPE_FLAGS;
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} else {
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/* Overrun avoidance */
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if (ptr + sizeof (ace_t) > end) {
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break;
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}
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acep = (ace_t *)ptr;
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acep->a_access_mask = BSWAP_32(acep->a_access_mask);
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acep->a_flags = BSWAP_16(acep->a_flags);
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ace_type = acep->a_type = BSWAP_16(acep->a_type);
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acep->a_who = BSWAP_32(acep->a_who);
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entry_type = acep->a_flags & ACE_TYPE_FLAGS;
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}
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switch (entry_type) {
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case ACE_OWNER:
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case ACE_EVERYONE:
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case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
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entry_size = zfs_layout ?
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sizeof (zfs_ace_hdr_t) : sizeof (ace_t);
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break;
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case ACE_IDENTIFIER_GROUP:
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default:
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/* Overrun avoidance */
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if (zfs_layout) {
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if (ptr + sizeof (zfs_ace_t) <= end) {
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zacep->z_fuid = BSWAP_64(zacep->z_fuid);
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} else {
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entry_size = sizeof (zfs_ace_t);
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break;
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}
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}
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switch (ace_type) {
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case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
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case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
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case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
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case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
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entry_size = zfs_layout ?
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sizeof (zfs_object_ace_t) :
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sizeof (ace_object_t);
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break;
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default:
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entry_size = zfs_layout ? sizeof (zfs_ace_t) :
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sizeof (ace_t);
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break;
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}
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}
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ptr = ptr + entry_size;
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}
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}
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/* ARGSUSED */
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void
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zfs_oldacl_byteswap(void *buf, size_t size)
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{
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int cnt;
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/*
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* Arggh, since we don't know how many ACEs are in
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* the array, we have to swap the entire block
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*/
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cnt = size / sizeof (ace_t);
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zfs_oldace_byteswap((ace_t *)buf, cnt);
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}
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/* ARGSUSED */
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void
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zfs_acl_byteswap(void *buf, size_t size)
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{
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zfs_ace_byteswap(buf, size, B_TRUE);
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}
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void
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zfs_znode_byteswap(void *buf, size_t size)
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{
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znode_phys_t *zp = buf;
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ASSERT(size >= sizeof (znode_phys_t));
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zp->zp_crtime[0] = BSWAP_64(zp->zp_crtime[0]);
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zp->zp_crtime[1] = BSWAP_64(zp->zp_crtime[1]);
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zp->zp_atime[0] = BSWAP_64(zp->zp_atime[0]);
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zp->zp_atime[1] = BSWAP_64(zp->zp_atime[1]);
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zp->zp_mtime[0] = BSWAP_64(zp->zp_mtime[0]);
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zp->zp_mtime[1] = BSWAP_64(zp->zp_mtime[1]);
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zp->zp_ctime[0] = BSWAP_64(zp->zp_ctime[0]);
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zp->zp_ctime[1] = BSWAP_64(zp->zp_ctime[1]);
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zp->zp_gen = BSWAP_64(zp->zp_gen);
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zp->zp_mode = BSWAP_64(zp->zp_mode);
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zp->zp_size = BSWAP_64(zp->zp_size);
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zp->zp_parent = BSWAP_64(zp->zp_parent);
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zp->zp_links = BSWAP_64(zp->zp_links);
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zp->zp_xattr = BSWAP_64(zp->zp_xattr);
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zp->zp_rdev = BSWAP_64(zp->zp_rdev);
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zp->zp_flags = BSWAP_64(zp->zp_flags);
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zp->zp_uid = BSWAP_64(zp->zp_uid);
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zp->zp_gid = BSWAP_64(zp->zp_gid);
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zp->zp_zap = BSWAP_64(zp->zp_zap);
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zp->zp_pad[0] = BSWAP_64(zp->zp_pad[0]);
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zp->zp_pad[1] = BSWAP_64(zp->zp_pad[1]);
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zp->zp_pad[2] = BSWAP_64(zp->zp_pad[2]);
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zp->zp_acl.z_acl_extern_obj = BSWAP_64(zp->zp_acl.z_acl_extern_obj);
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zp->zp_acl.z_acl_size = BSWAP_32(zp->zp_acl.z_acl_size);
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zp->zp_acl.z_acl_version = BSWAP_16(zp->zp_acl.z_acl_version);
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zp->zp_acl.z_acl_count = BSWAP_16(zp->zp_acl.z_acl_count);
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if (zp->zp_acl.z_acl_version == ZFS_ACL_VERSION) {
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zfs_acl_byteswap((void *)&zp->zp_acl.z_ace_data[0],
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ZFS_ACE_SPACE);
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} else {
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zfs_oldace_byteswap((ace_t *)&zp->zp_acl.z_ace_data[0],
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ACE_SLOT_CNT);
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}
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}
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#if defined(_KERNEL) && defined(HAVE_SPL)
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EXPORT_SYMBOL(zfs_oldacl_byteswap);
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EXPORT_SYMBOL(zfs_acl_byteswap);
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EXPORT_SYMBOL(zfs_znode_byteswap);
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#endif
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