[mirror_zfs.git] / zfs / lib / libzpool / zfs_byteswap.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident	"@(#)zfs_byteswap.c	1.3	07/10/25 SMI"

#include <sys/zfs_context.h>
#include <sys/vfs.h>
#include <sys/fs/zfs.h>
#include <sys/zfs_znode.h>
#include <sys/zfs_acl.h>

void
zfs_oldace_byteswap(ace_t *ace, int ace_cnt)
{
	int i;

	for (i = 0; i != ace_cnt; i++, ace++) {
		ace->a_who = BSWAP_32(ace->a_who);
		ace->a_access_mask = BSWAP_32(ace->a_access_mask);
		ace->a_flags = BSWAP_16(ace->a_flags);
		ace->a_type = BSWAP_16(ace->a_type);
	}
}

/*
 * swap ace_t and ace_oject_t
 */
void
zfs_ace_byteswap(void *buf, size_t size, boolean_t zfs_layout)
{
	caddr_t end;
	caddr_t ptr;
	zfs_ace_t *zacep;
	ace_t *acep;
	uint16_t entry_type;
	size_t entry_size;
	int ace_type;

	end = (caddr_t)buf + size;
	ptr = buf;

	while (ptr < end) {
		if (zfs_layout) {
			zacep = (zfs_ace_t *)ptr;
			zacep->z_hdr.z_access_mask =
			    BSWAP_32(zacep->z_hdr.z_access_mask);
			zacep->z_hdr.z_flags = BSWAP_16(zacep->z_hdr.z_flags);
			ace_type = zacep->z_hdr.z_type =
			    BSWAP_16(zacep->z_hdr.z_type);
			entry_type = zacep->z_hdr.z_flags & ACE_TYPE_FLAGS;
		} else {
			acep = (ace_t *)ptr;
			acep->a_access_mask = BSWAP_32(acep->a_access_mask);
			acep->a_flags = BSWAP_16(acep->a_flags);
			ace_type = acep->a_type = BSWAP_16(acep->a_type);
			acep->a_who = BSWAP_32(acep->a_who);
			entry_type = acep->a_flags & ACE_TYPE_FLAGS;
		}
		switch (entry_type) {
		case ACE_OWNER:
		case ACE_EVERYONE:
		case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
			entry_size = zfs_layout ?
			    sizeof (zfs_ace_hdr_t) : sizeof (ace_t);
			break;
		case ACE_IDENTIFIER_GROUP:
		default:
			if (zfs_layout) {
				zacep->z_fuid = BSWAP_64(zacep->z_fuid);
			}
			switch (ace_type) {
			case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
			case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
			case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
			case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
				entry_size = zfs_layout ?
				    sizeof (zfs_object_ace_t) :
				    sizeof (ace_object_t);
				break;
			default:
				entry_size = zfs_layout ? sizeof (zfs_ace_t) :
				    sizeof (ace_t);
				break;
			}
		}
		ptr = ptr + entry_size;
	}
}

/* ARGSUSED */
void
zfs_oldacl_byteswap(void *buf, size_t size)
{
	int cnt;

	/*
	 * Arggh, since we don't know how many ACEs are in
	 * the array, we have to swap the entire block
	 */

	cnt = size / sizeof (ace_t);

	zfs_oldace_byteswap((ace_t *)buf, cnt);
}

/* ARGSUSED */
void
zfs_acl_byteswap(void *buf, size_t size)
{
	zfs_ace_byteswap(buf, size, B_TRUE);
}

void
zfs_znode_byteswap(void *buf, size_t size)
{
	znode_phys_t *zp = buf;

	ASSERT(size >= sizeof (znode_phys_t));

	zp->zp_crtime[0] = BSWAP_64(zp->zp_crtime[0]);
	zp->zp_crtime[1] = BSWAP_64(zp->zp_crtime[1]);
	zp->zp_atime[0] = BSWAP_64(zp->zp_atime[0]);
	zp->zp_atime[1] = BSWAP_64(zp->zp_atime[1]);
	zp->zp_mtime[0] = BSWAP_64(zp->zp_mtime[0]);
	zp->zp_mtime[1] = BSWAP_64(zp->zp_mtime[1]);
	zp->zp_ctime[0] = BSWAP_64(zp->zp_ctime[0]);
	zp->zp_ctime[1] = BSWAP_64(zp->zp_ctime[1]);
	zp->zp_gen = BSWAP_64(zp->zp_gen);
	zp->zp_mode = BSWAP_64(zp->zp_mode);
	zp->zp_size = BSWAP_64(zp->zp_size);
	zp->zp_parent = BSWAP_64(zp->zp_parent);
	zp->zp_links = BSWAP_64(zp->zp_links);
	zp->zp_xattr = BSWAP_64(zp->zp_xattr);
	zp->zp_rdev = BSWAP_64(zp->zp_rdev);
	zp->zp_flags = BSWAP_64(zp->zp_flags);
	zp->zp_uid = BSWAP_64(zp->zp_uid);
	zp->zp_gid = BSWAP_64(zp->zp_gid);
	zp->zp_zap = BSWAP_64(zp->zp_zap);
	zp->zp_pad[0] = BSWAP_64(zp->zp_pad[0]);
	zp->zp_pad[1] = BSWAP_64(zp->zp_pad[1]);
	zp->zp_pad[2] = BSWAP_64(zp->zp_pad[2]);

	zp->zp_acl.z_acl_extern_obj = BSWAP_64(zp->zp_acl.z_acl_extern_obj);
	zp->zp_acl.z_acl_size = BSWAP_32(zp->zp_acl.z_acl_size);
	zp->zp_acl.z_acl_version = BSWAP_16(zp->zp_acl.z_acl_version);
	zp->zp_acl.z_acl_count = BSWAP_16(zp->zp_acl.z_acl_count);
	if (zp->zp_acl.z_acl_version == ZFS_ACL_VERSION) {
		zfs_acl_byteswap((void *)&zp->zp_acl.z_ace_data[0],
		    ZFS_ACE_SPACE);
	} else
		zfs_oldace_byteswap((ace_t *)&zp->zp_acl.z_ace_data[0],
		    ACE_SLOT_CNT);
}
Commit	Line	Data
34dc7c2f BB	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 "@(#)zfs_byteswap.c 1.3 07/10/25 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	}