1fa9e4066Sahrens /*
2fa9e4066Sahrens * CDDL HEADER START
3fa9e4066Sahrens *
4fa9e4066Sahrens * The contents of this file are subject to the terms of the
5da6c28aaSamw * Common Development and Distribution License (the "License").
6da6c28aaSamw * You may not use this file except in compliance with the License.
7fa9e4066Sahrens *
8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing.
10fa9e4066Sahrens * See the License for the specific language governing permissions
11fa9e4066Sahrens * and limitations under the License.
12fa9e4066Sahrens *
13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each
14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the
16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying
17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner]
18fa9e4066Sahrens *
19fa9e4066Sahrens * CDDL HEADER END
20fa9e4066Sahrens */
21fa9e4066Sahrens /*
220a586ceaSMark Shellenbaum * Copyright 2010 Sun Microsystems, Inc. All rights reserved.
23fa9e4066Sahrens * Use is subject to license terms.
24fa9e4066Sahrens */
25fa9e4066Sahrens
26fa9e4066Sahrens #include <sys/zfs_context.h>
27fa9e4066Sahrens #include <sys/vfs.h>
28fa9e4066Sahrens #include <sys/fs/zfs.h>
29fa9e4066Sahrens #include <sys/zfs_znode.h>
300a586ceaSMark Shellenbaum #include <sys/zfs_sa.h>
31fa9e4066Sahrens #include <sys/zfs_acl.h>
32fa9e4066Sahrens
33fa9e4066Sahrens void
zfs_oldace_byteswap(ace_t * ace,int ace_cnt)34da6c28aaSamw zfs_oldace_byteswap(ace_t *ace, int ace_cnt)
35fa9e4066Sahrens {
36fa9e4066Sahrens int i;
37fa9e4066Sahrens
38fa9e4066Sahrens for (i = 0; i != ace_cnt; i++, ace++) {
39fa9e4066Sahrens ace->a_who = BSWAP_32(ace->a_who);
40fa9e4066Sahrens ace->a_access_mask = BSWAP_32(ace->a_access_mask);
41fa9e4066Sahrens ace->a_flags = BSWAP_16(ace->a_flags);
42fa9e4066Sahrens ace->a_type = BSWAP_16(ace->a_type);
43fa9e4066Sahrens }
44fa9e4066Sahrens }
45fa9e4066Sahrens
46da6c28aaSamw /*
47da6c28aaSamw * swap ace_t and ace_oject_t
48da6c28aaSamw */
49da6c28aaSamw void
zfs_ace_byteswap(void * buf,size_t size,boolean_t zfs_layout)50da6c28aaSamw zfs_ace_byteswap(void *buf, size_t size, boolean_t zfs_layout)
51da6c28aaSamw {
52da6c28aaSamw caddr_t end;
53da6c28aaSamw caddr_t ptr;
54*d5285caeSGeorge Wilson zfs_ace_t *zacep = NULL;
55da6c28aaSamw ace_t *acep;
56da6c28aaSamw uint16_t entry_type;
57da6c28aaSamw size_t entry_size;
58da6c28aaSamw int ace_type;
59da6c28aaSamw
60da6c28aaSamw end = (caddr_t)buf + size;
61da6c28aaSamw ptr = buf;
62da6c28aaSamw
63da6c28aaSamw while (ptr < end) {
64da6c28aaSamw if (zfs_layout) {
65ae480683STim Haley /*
66ae480683STim Haley * Avoid overrun. Embedded aces can have one
67ae480683STim Haley * of several sizes. We don't know exactly
68ae480683STim Haley * how many our present, only the size of the
69ae480683STim Haley * buffer containing them. That size may be
70ae480683STim Haley * larger than needed to hold the aces
71ae480683STim Haley * present. As long as we do not do any
72ae480683STim Haley * swapping beyond the end of our block we are
73ae480683STim Haley * okay. It it safe to swap any non-ace data
74ae480683STim Haley * within the block since it is just zeros.
75ae480683STim Haley */
76ae480683STim Haley if (ptr + sizeof (zfs_ace_hdr_t) > end) {
77ae480683STim Haley break;
78ae480683STim Haley }
79da6c28aaSamw zacep = (zfs_ace_t *)ptr;
80da6c28aaSamw zacep->z_hdr.z_access_mask =
81da6c28aaSamw BSWAP_32(zacep->z_hdr.z_access_mask);
82da6c28aaSamw zacep->z_hdr.z_flags = BSWAP_16(zacep->z_hdr.z_flags);
83da6c28aaSamw ace_type = zacep->z_hdr.z_type =
84da6c28aaSamw BSWAP_16(zacep->z_hdr.z_type);
85da6c28aaSamw entry_type = zacep->z_hdr.z_flags & ACE_TYPE_FLAGS;
86da6c28aaSamw } else {
87ae480683STim Haley /* Overrun avoidance */
88ae480683STim Haley if (ptr + sizeof (ace_t) > end) {
89ae480683STim Haley break;
90ae480683STim Haley }
91da6c28aaSamw acep = (ace_t *)ptr;
92da6c28aaSamw acep->a_access_mask = BSWAP_32(acep->a_access_mask);
93da6c28aaSamw acep->a_flags = BSWAP_16(acep->a_flags);
94da6c28aaSamw ace_type = acep->a_type = BSWAP_16(acep->a_type);
95da6c28aaSamw acep->a_who = BSWAP_32(acep->a_who);
96da6c28aaSamw entry_type = acep->a_flags & ACE_TYPE_FLAGS;
97da6c28aaSamw }
98da6c28aaSamw switch (entry_type) {
99da6c28aaSamw case ACE_OWNER:
100da6c28aaSamw case ACE_EVERYONE:
101da6c28aaSamw case (ACE_IDENTIFIER_GROUP | ACE_GROUP):
102da6c28aaSamw entry_size = zfs_layout ?
103da6c28aaSamw sizeof (zfs_ace_hdr_t) : sizeof (ace_t);
104da6c28aaSamw break;
105da6c28aaSamw case ACE_IDENTIFIER_GROUP:
106da6c28aaSamw default:
107ae480683STim Haley /* Overrun avoidance */
108da6c28aaSamw if (zfs_layout) {
109ae480683STim Haley if (ptr + sizeof (zfs_ace_t) <= end) {
110da6c28aaSamw zacep->z_fuid = BSWAP_64(zacep->z_fuid);
111ae480683STim Haley } else {
112ae480683STim Haley entry_size = sizeof (zfs_ace_t);
113ae480683STim Haley break;
114ae480683STim Haley }
115da6c28aaSamw }
116da6c28aaSamw switch (ace_type) {
117da6c28aaSamw case ACE_ACCESS_ALLOWED_OBJECT_ACE_TYPE:
118da6c28aaSamw case ACE_ACCESS_DENIED_OBJECT_ACE_TYPE:
119da6c28aaSamw case ACE_SYSTEM_AUDIT_OBJECT_ACE_TYPE:
120da6c28aaSamw case ACE_SYSTEM_ALARM_OBJECT_ACE_TYPE:
121da6c28aaSamw entry_size = zfs_layout ?
122da6c28aaSamw sizeof (zfs_object_ace_t) :
123da6c28aaSamw sizeof (ace_object_t);
124da6c28aaSamw break;
125da6c28aaSamw default:
126da6c28aaSamw entry_size = zfs_layout ? sizeof (zfs_ace_t) :
127da6c28aaSamw sizeof (ace_t);
128da6c28aaSamw break;
129da6c28aaSamw }
130da6c28aaSamw }
131da6c28aaSamw ptr = ptr + entry_size;
132da6c28aaSamw }
133da6c28aaSamw }
134da6c28aaSamw
135fa9e4066Sahrens /* ARGSUSED */
136fa9e4066Sahrens void
zfs_oldacl_byteswap(void * buf,size_t size)137da6c28aaSamw zfs_oldacl_byteswap(void *buf, size_t size)
138fa9e4066Sahrens {
139fa9e4066Sahrens int cnt;
140fa9e4066Sahrens
141fa9e4066Sahrens /*
142fa9e4066Sahrens * Arggh, since we don't know how many ACEs are in
143fa9e4066Sahrens * the array, we have to swap the entire block
144fa9e4066Sahrens */
145fa9e4066Sahrens
146fa9e4066Sahrens cnt = size / sizeof (ace_t);
147fa9e4066Sahrens
148da6c28aaSamw zfs_oldace_byteswap((ace_t *)buf, cnt);
149da6c28aaSamw }
150da6c28aaSamw
151da6c28aaSamw /* ARGSUSED */
152da6c28aaSamw void
zfs_acl_byteswap(void * buf,size_t size)153da6c28aaSamw zfs_acl_byteswap(void *buf, size_t size)
154da6c28aaSamw {
155da6c28aaSamw zfs_ace_byteswap(buf, size, B_TRUE);
156fa9e4066Sahrens }
157fa9e4066Sahrens
158fa9e4066Sahrens void
zfs_znode_byteswap(void * buf,size_t size)159fa9e4066Sahrens zfs_znode_byteswap(void *buf, size_t size)
160fa9e4066Sahrens {
161fa9e4066Sahrens znode_phys_t *zp = buf;
162fa9e4066Sahrens
163fa9e4066Sahrens ASSERT(size >= sizeof (znode_phys_t));
164fa9e4066Sahrens
165fa9e4066Sahrens zp->zp_crtime[0] = BSWAP_64(zp->zp_crtime[0]);
166fa9e4066Sahrens zp->zp_crtime[1] = BSWAP_64(zp->zp_crtime[1]);
167fa9e4066Sahrens zp->zp_atime[0] = BSWAP_64(zp->zp_atime[0]);
168fa9e4066Sahrens zp->zp_atime[1] = BSWAP_64(zp->zp_atime[1]);
169fa9e4066Sahrens zp->zp_mtime[0] = BSWAP_64(zp->zp_mtime[0]);
170fa9e4066Sahrens zp->zp_mtime[1] = BSWAP_64(zp->zp_mtime[1]);
171fa9e4066Sahrens zp->zp_ctime[0] = BSWAP_64(zp->zp_ctime[0]);
172fa9e4066Sahrens zp->zp_ctime[1] = BSWAP_64(zp->zp_ctime[1]);
173fa9e4066Sahrens zp->zp_gen = BSWAP_64(zp->zp_gen);
174fa9e4066Sahrens zp->zp_mode = BSWAP_64(zp->zp_mode);
175fa9e4066Sahrens zp->zp_size = BSWAP_64(zp->zp_size);
176fa9e4066Sahrens zp->zp_parent = BSWAP_64(zp->zp_parent);
177fa9e4066Sahrens zp->zp_links = BSWAP_64(zp->zp_links);
178fa9e4066Sahrens zp->zp_xattr = BSWAP_64(zp->zp_xattr);
179fa9e4066Sahrens zp->zp_rdev = BSWAP_64(zp->zp_rdev);
180fa9e4066Sahrens zp->zp_flags = BSWAP_64(zp->zp_flags);
181fa9e4066Sahrens zp->zp_uid = BSWAP_64(zp->zp_uid);
182fa9e4066Sahrens zp->zp_gid = BSWAP_64(zp->zp_gid);
183da6c28aaSamw zp->zp_zap = BSWAP_64(zp->zp_zap);
184fa9e4066Sahrens zp->zp_pad[0] = BSWAP_64(zp->zp_pad[0]);
185fa9e4066Sahrens zp->zp_pad[1] = BSWAP_64(zp->zp_pad[1]);
186fa9e4066Sahrens zp->zp_pad[2] = BSWAP_64(zp->zp_pad[2]);
187fa9e4066Sahrens
188fa9e4066Sahrens zp->zp_acl.z_acl_extern_obj = BSWAP_64(zp->zp_acl.z_acl_extern_obj);
189da6c28aaSamw zp->zp_acl.z_acl_size = BSWAP_32(zp->zp_acl.z_acl_size);
190fa9e4066Sahrens zp->zp_acl.z_acl_version = BSWAP_16(zp->zp_acl.z_acl_version);
191da6c28aaSamw zp->zp_acl.z_acl_count = BSWAP_16(zp->zp_acl.z_acl_count);
192da6c28aaSamw if (zp->zp_acl.z_acl_version == ZFS_ACL_VERSION) {
193da6c28aaSamw zfs_acl_byteswap((void *)&zp->zp_acl.z_ace_data[0],
194da6c28aaSamw ZFS_ACE_SPACE);
195ae480683STim Haley } else {
196da6c28aaSamw zfs_oldace_byteswap((ace_t *)&zp->zp_acl.z_ace_data[0],
197da6c28aaSamw ACE_SLOT_CNT);
198fa9e4066Sahrens }
199ae480683STim Haley }
200